diff --git a/app/src/main/res/layout/activity_dir_picker.xml b/app/src/main/res/layout/activity_dir_picker.xml
index f6c243126..c0bf867e0 100644
--- a/app/src/main/res/layout/activity_dir_picker.xml
+++ b/app/src/main/res/layout/activity_dir_picker.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,28 +14,27 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="@dimen/keyline_margin"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:padding="@dimen/keyline_margin">
 
     <TextView
         android:id="@+id/path"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginBottom="8dp"
-        android:singleLine="true"
         android:ellipsize="start"
+        android:singleLine="true"
         android:textColor="?android:attr/textColorPrimary"
-        android:textSize="@dimen/text_little_small"/>
+        android:textSize="@dimen/text_little_small" />
 
     <com.hippo.widget.DirExplorer
         android:id="@+id/dir_explorer"
         android:layout_width="match_parent"
         android:layout_height="0dp"
-        android:layout_weight="1"/>
+        android:layout_weight="1" />
 
     <FrameLayout
         android:layout_width="match_parent"
@@ -49,7 +47,7 @@
             android:layout_height="wrap_content"
             android:layout_gravity="left"
             android:text="@string/preset"
-            android:textColor="?attr/colorAccent"/>
+            android:textColor="?attr/colorAccent" />
 
         <TextView
             android:id="@+id/ok"
@@ -58,7 +56,7 @@
             android:layout_height="wrap_content"
             android:layout_gravity="right"
             android:text="@android:string/ok"
-            android:textColor="?attr/colorPrimary"/>
+            android:textColor="?attr/colorPrimary" />
 
     </FrameLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/activity_filter.xml b/app/src/main/res/layout/activity_filter.xml
index 6c24e2451..510f62c20 100644
--- a/app/src/main/res/layout/activity_filter.xml
+++ b/app/src/main/res/layout/activity_filter.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -24,16 +22,16 @@
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:padding="@dimen/keyline_margin"/>
+        android:padding="@dimen/keyline_margin" />
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="16dp"
-        android:text="@string/no_filter"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal"
+        android:text="@string/no_filter" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/activity_gallery.xml b/app/src/main/res/layout/activity_gallery.xml
index bd179bc96..6030066c5 100644
--- a/app/src/main/res/layout/activity_gallery.xml
+++ b/app/src/main/res/layout/activity_gallery.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/main"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -24,7 +22,7 @@
     <com.hippo.glview.view.GLRootView
         android:id="@+id/gl_root_view"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="match_parent" />
 
     <com.hippo.ehviewer.widget.GalleryHeader
         android:id="@+id/gallery_header"
@@ -39,7 +37,7 @@
             android:layout_gravity="right"
             android:layout_marginTop="@dimen/gallery_widget_margin_v"
             android:layout_marginRight="@dimen/gallery_widget_margin_h"
-            android:textColor="?android:attr/textColorSecondary"/>
+            android:textColor="?android:attr/textColorSecondary" />
 
         <TextView
             android:id="@+id/progress"
@@ -47,19 +45,18 @@
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
             android:layout_marginTop="@dimen/gallery_widget_margin_v"
-            android:textColor="?android:attr/textColorSecondary"/>
+            android:textColor="?android:attr/textColorSecondary" />
 
-        <com.hippo.widget.BatteryView
-            xmlns:app="http://schemas.android.com/apk/res-auto"
+        <com.hippo.widget.BatteryView xmlns:app="http://schemas.android.com/apk/res-auto"
             android:id="@+id/battery"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="left"
-            android:layout_marginTop="@dimen/gallery_widget_margin_v"
             android:layout_marginLeft="@dimen/gallery_widget_margin_h"
+            android:layout_marginTop="@dimen/gallery_widget_margin_v"
             android:drawablePadding="4dp"
             app:color="?android:attr/textColorSecondary"
-            app:warningColor="@color/red_500"/>
+            app:warningColor="@color/red_500" />
 
     </com.hippo.ehviewer.widget.GalleryHeader>
 
@@ -68,11 +65,11 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="bottom"
-        android:paddingLeft="16dp"
-        android:paddingRight="16dp"
-        android:orientation="horizontal"
         android:background="?attr/gallerySliderBackgroundColor"
         android:fitsSystemWindows="true"
+        android:orientation="horizontal"
+        android:paddingLeft="16dp"
+        android:paddingRight="16dp"
         android:visibility="invisible">
 
         <TextView
@@ -80,7 +77,7 @@
             android:layout_width="32dp"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
-            android:gravity="center_horizontal"/>
+            android:gravity="center_horizontal" />
 
         <FrameLayout
             android:layout_width="0dp"
@@ -91,7 +88,7 @@
                 android:id="@+id/seek_bar"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_gravity="center_vertical"/>
+                android:layout_gravity="center_vertical" />
 
         </FrameLayout>
 
@@ -100,7 +97,7 @@
             android:layout_width="32dp"
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
-            android:gravity="center_horizontal"/>
+            android:gravity="center_horizontal" />
 
     </com.hippo.ehviewer.widget.SeekBarPanel>
 
diff --git a/app/src/main/res/layout/activity_hosts.xml b/app/src/main/res/layout/activity_hosts.xml
index ab6e0ec62..2f3bed602 100644
--- a/app/src/main/res/layout/activity_hosts.xml
+++ b/app/src/main/res/layout/activity_hosts.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,42 +14,41 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:orientation="vertical"
-  android:layout_width="match_parent"
-  android:layout_height="match_parent">
-
-  <com.hippo.easyrecyclerview.EasyRecyclerView
-    android:id="@+id/recycler_view"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:clipToPadding="false"/>
+    android:orientation="vertical">
 
-  <TextView
-    android:id="@+id/tip"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_gravity="center"
-    android:gravity="center"
-    android:textSize="@dimen/text_super_large"
-    android:text="@string/hosts_tip"/>
+    <com.hippo.easyrecyclerview.EasyRecyclerView
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:clipToPadding="false" />
 
-  <com.hippo.widget.FabLayout
-    android:id="@+id/fab_layout"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:paddingRight="@dimen/corner_fab_margin"
-    android:paddingBottom="@dimen/corner_fab_margin">
+    <TextView
+        android:id="@+id/tip"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:gravity="center"
+        android:text="@string/hosts_tip"
+        android:textSize="@dimen/text_super_large" />
 
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-      xmlns:app="http://schemas.android.com/apk/res-auto"
-      android:id="@+id/fab"
-      android:layout_width="wrap_content"
-      android:layout_height="wrap_content"
-      app:srcCompat="@drawable/v_plus_dark_x24"
-      app:backgroundTint="?attr/widgetColorThemePrimary"
-      style="@style/Widget.Design.FloatingActionButton"/>
+    <com.hippo.widget.FabLayout
+        android:id="@+id/fab_layout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:paddingRight="@dimen/corner_fab_margin"
+        android:paddingBottom="@dimen/corner_fab_margin">
 
-  </com.hippo.widget.FabLayout>
+        <com.google.android.material.floatingactionbutton.FloatingActionButton xmlns:app="http://schemas.android.com/apk/res-auto"
+            android:id="@+id/fab"
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:backgroundTint="?attr/widgetColorThemePrimary"
+            app:srcCompat="@drawable/v_plus_dark_x24"
+            app:tint="#fff" />
+
+    </com.hippo.widget.FabLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/activity_my_tags.xml b/app/src/main/res/layout/activity_my_tags.xml
index 841181f7f..f3f45dbff 100644
--- a/app/src/main/res/layout/activity_my_tags.xml
+++ b/app/src/main/res/layout/activity_my_tags.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,24 +14,23 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:orientation="vertical"
-  android:layout_width="match_parent"
-  android:layout_height="match_parent"
-  android:animateLayoutChanges="true">
-
-  <WebView
-    android:id="@+id/webview"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"/>
+    android:layout_height="match_parent"
+    android:animateLayoutChanges="true"
+    android:orientation="vertical">
 
-  <com.hippo.widget.ProgressView
-    android:id="@+id/progress"
-    style="@style/ProgressView"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_gravity="center"
-    android:visibility="gone"/>
+    <WebView
+        android:id="@+id/webview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <com.hippo.widget.ProgressView
+        android:id="@+id/progress"
+        style="@style/ProgressView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:visibility="gone" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/activity_set_security.xml b/app/src/main/res/layout/activity_set_security.xml
index 8c8b6d79b..47cd459a6 100755
--- a/app/src/main/res/layout/activity_set_security.xml
+++ b/app/src/main/res/layout/activity_set_security.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,38 +14,36 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
 
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
-        android:text="@string/set_pattern_protection_tip"
+        android:gravity="center"
         android:padding="@dimen/keyline_margin"
-        android:gravity="center"/>
+        android:text="@string/set_pattern_protection_tip"
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium" />
 
     <FrameLayout
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1">
 
-        <com.hippo.widget.MaxSizeContainer
-            xmlns:app="http://schemas.android.com/apk/res-auto"
+        <com.hippo.widget.MaxSizeContainer xmlns:app="http://schemas.android.com/apk/res-auto"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="center"
             android:layout_margin="32dp"
-            app:maxWidth="320dp"
-            app:maxHeight="320dp">
+            app:maxHeight="320dp"
+            app:maxWidth="320dp">
 
             <com.hippo.widget.lockpattern.LockPatternView
                 android:id="@+id/pattern_view"
                 android:layout_width="wrap_content"
-                android:layout_height="wrap_content"/>
+                android:layout_height="wrap_content" />
 
         </com.hippo.widget.MaxSizeContainer>
     </FrameLayout>
@@ -57,20 +54,20 @@
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:layout_marginBottom="20dp"
-        android:visibility="gone"
-        android:text="@string/enable_fingerprint" />
+        android:text="@string/enable_fingerprint"
+        android:visibility="gone" />
 
     <LinearLayout
         android:id="@+id/buttonPanel"
+        style="?attr/buttonBarStyle"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:gravity="bottom"
         android:orientation="horizontal"
         android:paddingLeft="12dp"
-        android:paddingRight="12dp"
         android:paddingTop="4dp"
-        android:paddingBottom="4dp"
-        android:gravity="bottom"
-        style="?attr/buttonBarStyle">
+        android:paddingRight="12dp"
+        android:paddingBottom="4dp">
 
         <Button
             android:id="@+id/cancel"
@@ -78,8 +75,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:textColor="?attr/colorAccent"
-            android:text="@android:string/cancel"/>
+            android:text="@android:string/cancel"
+            android:textColor="?attr/colorAccent" />
 
         <Button
             android:id="@+id/set"
@@ -87,8 +84,8 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:textColor="?attr/colorPrimary"
-            android:text="@string/set"/>
+            android:text="@string/set"
+            android:textColor="?attr/colorPrimary" />
 
     </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/activity_toolbar.xml b/app/src/main/res/layout/activity_toolbar.xml
index e1500e16b..1891bcf7a 100644
--- a/app/src/main/res/layout/activity_toolbar.xml
+++ b/app/src/main/res/layout/activity_toolbar.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,5 +15,6 @@
   -->
 
 <merge>
-    <include layout="@layout/scene_toolbar"/>
+
+    <include layout="@layout/scene_toolbar" />
 </merge>
diff --git a/app/src/main/res/layout/activity_u_config.xml b/app/src/main/res/layout/activity_u_config.xml
index 841181f7f..f3f45dbff 100644
--- a/app/src/main/res/layout/activity_u_config.xml
+++ b/app/src/main/res/layout/activity_u_config.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,24 +14,23 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:orientation="vertical"
-  android:layout_width="match_parent"
-  android:layout_height="match_parent"
-  android:animateLayoutChanges="true">
-
-  <WebView
-    android:id="@+id/webview"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"/>
+    android:layout_height="match_parent"
+    android:animateLayoutChanges="true"
+    android:orientation="vertical">
 
-  <com.hippo.widget.ProgressView
-    android:id="@+id/progress"
-    style="@style/ProgressView"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_gravity="center"
-    android:visibility="gone"/>
+    <WebView
+        android:id="@+id/webview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+    <com.hippo.widget.ProgressView
+        android:id="@+id/progress"
+        style="@style/ProgressView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:visibility="gone" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/alert_dialog_progress_material.xml b/app/src/main/res/layout/alert_dialog_progress_material.xml
index 2ebc36616..c0ac90549 100644
--- a/app/src/main/res/layout/alert_dialog_progress_material.xml
+++ b/app/src/main/res/layout/alert_dialog_progress_material.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
      Copyright (C) 2014 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,22 +21,25 @@
     android:paddingTop="@dimen/dialog_padding_top_material"
     android:paddingRight="?attr/dialogPreferredPadding"
     android:paddingBottom="@dimen/dialog_padding_top_material">
+
     <ProgressBar
         android:id="@+id/progress"
         style="?android:attr/progressBarStyleHorizontal"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_centerHorizontal="true" />
+
     <TextView
         android:id="@+id/progress_percent"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_alignParentLeft="true"
-        android:layout_below="@id/progress" />
+        android:layout_below="@id/progress"
+        android:layout_alignParentLeft="true" />
+
     <TextView
         android:id="@+id/progress_number"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_alignParentRight="true"
-        android:layout_below="@id/progress" />
+        android:layout_below="@id/progress"
+        android:layout_alignParentRight="true" />
 </RelativeLayout>
diff --git a/app/src/main/res/layout/button_guide.xml b/app/src/main/res/layout/button_guide.xml
index 3b17f3d0f..1e41fa807 100644
--- a/app/src/main/res/layout/button_guide.xml
+++ b/app/src/main/res/layout/button_guide.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,13 +14,12 @@
   ~ limitations under the License.
   -->
 
-<Button
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<Button xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
-    android:text="@string/get_it"
-    android:textStyle="bold"
     android:background="@null"
-    android:textSize="@dimen/text_little_small"
+    android:text="@string/get_it"
     android:textAllCaps="true"
-    android:textColor="@android:color/white"/>
+    android:textColor="@android:color/white"
+    android:textSize="@dimen/text_little_small"
+    android:textStyle="bold" />
diff --git a/app/src/main/res/layout/dialog_add_filter.xml b/app/src/main/res/layout/dialog_add_filter.xml
index 391d36016..c11f98870 100644
--- a/app/src/main/res/layout/dialog_add_filter.xml
+++ b/app/src/main/res/layout/dialog_add_filter.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical"
@@ -28,7 +26,7 @@
         android:id="@+id/spinner"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:entries="@array/filter_entries"/>
+        android:entries="@array/filter_entries" />
 
     <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/text_input_layout"
@@ -45,7 +43,7 @@
             android:imeOptions="actionDone"
             android:inputType="text"
             android:maxLines="1"
-            android:singleLine="true"/>
+            android:singleLine="true" />
 
     </com.google.android.material.textfield.TextInputLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_archive_list.xml b/app/src/main/res/layout/dialog_archive_list.xml
index 4f9f8ad95..cfc328402 100644
--- a/app/src/main/res/layout/dialog_archive_list.xml
+++ b/app/src/main/res/layout/dialog_archive_list.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:paddingTop="@dimen/abc_dialog_padding_top_material"
@@ -27,18 +25,18 @@
         style="@style/ProgressView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center"/>
+        android:layout_gravity="center" />
 
     <TextView
         android:id="@+id/text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:textAppearance="@style/TextAppearance.AppCompat.Medium"/>
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium" />
 
     <ListView
         android:id="@+id/list_view"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="match_parent" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/dialog_checkbox_builder.xml b/app/src/main/res/layout/dialog_checkbox_builder.xml
index ca5ab1f9c..6deedda71 100644
--- a/app/src/main/res/layout/dialog_checkbox_builder.xml
+++ b/app/src/main/res/layout/dialog_checkbox_builder.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
@@ -34,7 +32,7 @@
             android:layout_height="wrap_content"
             android:paddingLeft="?attr/dialogPreferredPadding"
             android:paddingTop="@dimen/abc_dialog_padding_top_material"
-            android:paddingRight="?attr/dialogPreferredPadding"/>
+            android:paddingRight="?attr/dialogPreferredPadding" />
 
     </com.hippo.widget.IndicatingScrollView>
 
@@ -44,6 +42,6 @@
         android:layout_height="wrap_content"
         android:layout_marginLeft="?attr/dialogPreferredPadding"
         android:layout_marginTop="@dimen/abc_dialog_padding_top_material"
-        android:layout_marginRight="?attr/dialogPreferredPadding"/>
+        android:layout_marginRight="?attr/dialogPreferredPadding" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_donate.xml b/app/src/main/res/layout/dialog_donate.xml
index c2e02b9ea..942c4eccd 100644
--- a/app/src/main/res/layout/dialog_donate.xml
+++ b/app/src/main/res/layout/dialog_donate.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,87 +14,86 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:layout_width="match_parent"
-  android:layout_height="wrap_content"
-  android:orientation="vertical"
-  android:padding="@dimen/keyline_margin">
-
-  <TextView
-    android:layout_width="wrap_content"
-    android:layout_height="match_parent"
-    android:text="@string/settings_about_donate_message"/>
-
-  <Space
-    android:layout_width="wrap_content"
-    android:layout_height="@dimen/keyline_margin"/>
-
-  <TextView
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:gravity="center"
-    android:text="@string/settings_about_donate_alipay"
-    android:textColor="?attr/textColorThemePrimary"
-    android:textStyle="bold"
-    android:textSize="@dimen/text_little_small"/>
+    android:orientation="vertical"
+    android:padding="@dimen/keyline_margin">
 
-  <TextView
-    android:id="@+id/alipay_text"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:gravity="center"/>
-
-  <Button
-    android:id="@+id/alipay_copy"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_gravity="center"
-    android:text="@string/settings_about_donate_copy"
-    style="@style/Widget.AppCompat.Button.Borderless.Colored"/>
-
-  <Space
-    android:layout_width="wrap_content"
-    android:layout_height="@dimen/keyline_margin"/>
-
-  <TextView
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:gravity="center"
-    android:text="@string/settings_about_donate_paypal"
-    android:textColor="?attr/textColorThemePrimary"
-    android:textStyle="bold"
-    android:textSize="@dimen/text_little_small"/>
-
-  <TextView
-    android:id="@+id/paypal_text"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:gravity="center"/>
-
-  <LinearLayout
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:orientation="horizontal">
-
-    <Button
-      android:id="@+id/paypal_open"
-      android:layout_width="wrap_content"
-      android:layout_height="wrap_content"
-      android:text="@string/settings_about_donate_open"
-      style="@style/Widget.AppCompat.Button.Borderless.Colored"/>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:text="@string/settings_about_donate_message" />
 
     <Space
-      android:layout_width="0dp"
-      android:layout_height="wrap_content"
-      android:layout_weight="1"/>
+        android:layout_width="wrap_content"
+        android:layout_height="@dimen/keyline_margin" />
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/settings_about_donate_alipay"
+        android:textColor="?attr/textColorThemePrimary"
+        android:textSize="@dimen/text_little_small"
+        android:textStyle="bold" />
+
+    <TextView
+        android:id="@+id/alipay_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center" />
 
     <Button
-      android:id="@+id/paypal_copy"
-      android:layout_width="wrap_content"
-      android:layout_height="wrap_content"
-      android:text="@string/settings_about_donate_copy"
-      style="@style/Widget.AppCompat.Button.Borderless.Colored"/>
+        android:id="@+id/alipay_copy"
+        style="@style/Widget.AppCompat.Button.Borderless.Colored"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="@string/settings_about_donate_copy" />
 
-  </LinearLayout>
+    <Space
+        android:layout_width="wrap_content"
+        android:layout_height="@dimen/keyline_margin" />
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="@string/settings_about_donate_paypal"
+        android:textColor="?attr/textColorThemePrimary"
+        android:textSize="@dimen/text_little_small"
+        android:textStyle="bold" />
+
+    <TextView
+        android:id="@+id/paypal_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/paypal_open"
+            style="@style/Widget.AppCompat.Button.Borderless.Colored"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/settings_about_donate_open" />
+
+        <Space
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1" />
+
+        <Button
+            android:id="@+id/paypal_copy"
+            style="@style/Widget.AppCompat.Button.Borderless.Colored"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/settings_about_donate_copy" />
+
+    </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_edittext_builder.xml b/app/src/main/res/layout/dialog_edittext_builder.xml
index 4376ff1ac..ec3074846 100644
--- a/app/src/main/res/layout/dialog_edittext_builder.xml
+++ b/app/src/main/res/layout/dialog_edittext_builder.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<com.google.android.material.textfield.TextInputLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.google.android.material.textfield.TextInputLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingLeft="?attr/dialogPreferredPadding"
@@ -30,6 +28,6 @@
         android:imeOptions="actionDone"
         android:inputType="text"
         android:maxLines="1"
-        android:singleLine="true"/>
+        android:singleLine="true" />
 
 </com.google.android.material.textfield.TextInputLayout>
diff --git a/app/src/main/res/layout/dialog_gallery_menu.xml b/app/src/main/res/layout/dialog_gallery_menu.xml
index 6435d5736..b882f2ceb 100644
--- a/app/src/main/res/layout/dialog_gallery_menu.xml
+++ b/app/src/main/res/layout/dialog_gallery_menu.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,19 +14,17 @@
   ~ limitations under the License.
   -->
 
-<com.hippo.widget.IndicatingScrollView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.widget.IndicatingScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     style="@style/Indicating"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
-    <LinearLayout
-        xmlns:android="http://schemas.android.com/apk/res/android"
-        android:orientation="vertical"
+    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:padding="@dimen/keyline_margin"
         android:divider="@drawable/spacer_keyline"
+        android:orientation="vertical"
+        android:padding="@dimen/keyline_margin"
         android:showDividers="middle">
 
         <LinearLayout
@@ -38,18 +35,18 @@
             <TextView
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
                 android:layout_gravity="center_vertical"
+                android:layout_weight="1"
                 android:text="@string/settings_read_screen_rotation"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <com.hippo.widget.CuteSpinner
                 android:id="@+id/screen_rotation"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="2"
                 android:layout_gravity="center_vertical"
-                android:entries="@array/screen_rotation_entries"/>
+                android:layout_weight="2"
+                android:entries="@array/screen_rotation_entries" />
 
         </LinearLayout>
 
@@ -61,18 +58,18 @@
             <TextView
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
                 android:layout_gravity="center_vertical"
+                android:layout_weight="1"
                 android:text="@string/settings_read_reading_direction"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <com.hippo.widget.CuteSpinner
                 android:id="@+id/reading_direction"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="2"
                 android:layout_gravity="center_vertical"
-                android:entries="@array/reading_direction_entries"/>
+                android:layout_weight="2"
+                android:entries="@array/reading_direction_entries" />
 
         </LinearLayout>
 
@@ -84,18 +81,18 @@
             <TextView
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
                 android:layout_gravity="center_vertical"
+                android:layout_weight="1"
                 android:text="@string/settings_read_page_scaling"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <com.hippo.widget.CuteSpinner
                 android:id="@+id/page_scaling"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="2"
                 android:layout_gravity="center_vertical"
-                android:entries="@array/page_scaling_entries"/>
+                android:layout_weight="2"
+                android:entries="@array/page_scaling_entries" />
 
         </LinearLayout>
 
@@ -107,18 +104,18 @@
             <TextView
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
                 android:layout_gravity="center_vertical"
+                android:layout_weight="1"
                 android:text="@string/settings_read_start_position"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <com.hippo.widget.CuteSpinner
                 android:id="@+id/start_position"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="2"
                 android:layout_gravity="center_vertical"
-                android:entries="@array/start_position_entries"/>
+                android:layout_weight="2"
+                android:entries="@array/start_position_entries" />
 
         </LinearLayout>
 
@@ -127,62 +124,62 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/settings_read_keep_screen_on"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/show_clock"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/settings_read_show_clock"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/show_progress"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/settings_read_show_progress"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/show_battery"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/settings_read_show_battery"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <androidx.appcompat.widget.SwitchCompat
-          android:id="@+id/show_page_interval"
-          android:layout_width="match_parent"
-          android:layout_height="wrap_content"
-          android:text="@string/settings_read_show_page_interval"
-          android:textColor="?android:attr/textColorPrimary"/>
+            android:id="@+id/show_page_interval"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@string/settings_read_show_page_interval"
+            android:textColor="?android:attr/textColorPrimary" />
 
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/volume_page"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/settings_read_volume_page"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/reading_fullscreen"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/settings_read_reading_fullscreen"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/custom_screen_lightness"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="@string/settings_read_custom_screen_lightness"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <SeekBar
             android:id="@+id/screen_lightness"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:max="200"/>
+            android:max="200" />
 
     </LinearLayout>
 </com.hippo.widget.IndicatingScrollView>
diff --git a/app/src/main/res/layout/dialog_go_to.xml b/app/src/main/res/layout/dialog_go_to.xml
index 756410e52..f135375fb 100644
--- a/app/src/main/res/layout/dialog_go_to.xml
+++ b/app/src/main/res/layout/dialog_go_to.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,35 +14,34 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingTop="16dp"
+    android:orientation="horizontal"
     android:paddingLeft="16dp"
-    android:paddingRight="16dp"
-    android:orientation="horizontal">
+    android:paddingTop="16dp"
+    android:paddingRight="16dp">
 
     <TextView
         android:id="@+id/start"
         android:layout_width="32dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
-        android:gravity="center_horizontal"/>
+        android:gravity="center_horizontal" />
 
     <com.hippo.widget.Slider
         android:id="@+id/slider"
         style="@style/Slider"
         android:layout_width="0dp"
         android:layout_height="48dp"
-        android:layout_weight="1"
-        android:layout_gravity="center_horizontal"/>
+        android:layout_gravity="center_horizontal"
+        android:layout_weight="1" />
 
     <TextView
         android:id="@+id/end"
         android:layout_width="32dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
-        android:gravity="center_horizontal"/>
+        android:gravity="center_horizontal" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_hosts.xml b/app/src/main/res/layout/dialog_hosts.xml
index 93e125d9e..e67076ea0 100644
--- a/app/src/main/res/layout/dialog_hosts.xml
+++ b/app/src/main/res/layout/dialog_hosts.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,40 +14,39 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:orientation="vertical"
-  android:layout_width="match_parent"
-  android:layout_height="match_parent"
-  android:paddingLeft="?attr/dialogPreferredPadding"
-  android:paddingTop="@dimen/abc_dialog_padding_top_material"
-  android:paddingRight="?attr/dialogPreferredPadding">
-
-  <com.google.android.material.textfield.TextInputLayout
-    android:id="@+id/host_input_layout"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:hint="@string/hosts_host">
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:paddingLeft="?attr/dialogPreferredPadding"
+    android:paddingTop="@dimen/abc_dialog_padding_top_material"
+    android:paddingRight="?attr/dialogPreferredPadding">
 
-    <com.hippo.widget.HackyTextInputEditText
-      android:id="@+id/host"
-      android:layout_width="match_parent"
-      android:layout_height="wrap_content"
-      android:inputType="text"/>
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/host_input_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/hosts_host">
 
-  </com.google.android.material.textfield.TextInputLayout>
+        <com.hippo.widget.HackyTextInputEditText
+            android:id="@+id/host"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="text" />
 
-  <com.google.android.material.textfield.TextInputLayout
-    android:id="@+id/ip_input_layout"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:hint="@string/hosts_ip">
+    </com.google.android.material.textfield.TextInputLayout>
 
-    <com.hippo.widget.HackyTextInputEditText
-      android:id="@+id/ip"
-      android:layout_width="match_parent"
-      android:layout_height="wrap_content"
-      android:inputType="text"/>
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/ip_input_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/hosts_ip">
 
-  </com.google.android.material.textfield.TextInputLayout>
+        <com.hippo.widget.HackyTextInputEditText
+            android:id="@+id/ip"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="text" />
+
+    </com.google.android.material.textfield.TextInputLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_item_select_with_icon.xml b/app/src/main/res/layout/dialog_item_select_with_icon.xml
index 46f23f217..b2bef3510 100644
--- a/app/src/main/res/layout/dialog_item_select_with_icon.xml
+++ b/app/src/main/res/layout/dialog_item_select_with_icon.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
      Copyright (C) 2014 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
@@ -24,11 +23,11 @@
     android:id="@android:id/text1"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:minHeight="?android:attr/listPreferredItemHeightSmall"
-    android:textAppearance="?android:attr/textAppearanceListItemSmall"
-    android:textColor="?android:attr/textColorAlertDialogListItem"
+    android:drawablePadding="@dimen/keyline_margin"
+    android:ellipsize="marquee"
     android:gravity="center_vertical"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall"
     android:paddingLeft="?attr/listPreferredItemPaddingLeft"
     android:paddingRight="?attr/listPreferredItemPaddingRight"
-    android:drawablePadding="@dimen/keyline_margin"
-    android:ellipsize="marquee"/>
+    android:textAppearance="?android:attr/textAppearanceListItemSmall"
+    android:textColor="?android:attr/textColorAlertDialogListItem" />
diff --git a/app/src/main/res/layout/dialog_js_prompt.xml b/app/src/main/res/layout/dialog_js_prompt.xml
index 691f8b9f8..95aaee812 100644
--- a/app/src/main/res/layout/dialog_js_prompt.xml
+++ b/app/src/main/res/layout/dialog_js_prompt.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,24 +14,23 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:orientation="vertical"
-  android:layout_width="match_parent"
-  android:layout_height="wrap_content"
-  android:padding="@dimen/keyline_margin">
-
-  <TextView
-    android:id="@+id/message"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:textAppearance="@style/TextAppearance.AppCompat.Subhead"/>
+    android:orientation="vertical"
+    android:padding="@dimen/keyline_margin">
 
-  <EditText
-    android:id="@+id/value"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:layout_marginTop="@dimen/keyline_margin"
-    android:inputType="text"/>
+    <TextView
+        android:id="@+id/message"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textAppearance="@style/TextAppearance.AppCompat.Subhead" />
+
+    <EditText
+        android:id="@+id/value"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="@dimen/keyline_margin"
+        android:inputType="text" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_list_checkbox_builder.xml b/app/src/main/res/layout/dialog_list_checkbox_builder.xml
index 3f2897d2f..0346dc5f8 100644
--- a/app/src/main/res/layout/dialog_list_checkbox_builder.xml
+++ b/app/src/main/res/layout/dialog_list_checkbox_builder.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,27 +14,25 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content">
+    android:layout_height="wrap_content"
+    android:orientation="vertical">
 
-    <com.hippo.widget.IndicatingListView
-        xmlns:android="http://schemas.android.com/apk/res/android"
+    <com.hippo.widget.IndicatingListView xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/list_view"
+        style="@style/Indicating"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1"
         android:cacheColorHint="@null"
+        android:clipToPadding="false"
         android:divider="?attr/listDividerAlertDialog"
-        android:scrollbars="vertical"
-        android:overScrollMode="ifContentScrolls"
         android:fadingEdge="none"
+        android:overScrollMode="ifContentScrolls"
         android:paddingTop="8dp"
         android:paddingBottom="8dp"
-        android:clipToPadding="false"
-        style="@style/Indicating"/>
+        android:scrollbars="vertical" />
 
     <androidx.appcompat.widget.AppCompatCheckBox
         android:id="@+id/checkbox"
@@ -43,6 +40,6 @@
         android:layout_height="wrap_content"
         android:layout_marginLeft="?attr/dialogPreferredPadding"
         android:layout_marginRight="?attr/dialogPreferredPadding"
-        android:layout_marginBottom="@dimen/abc_dialog_padding_top_material"/>
+        android:layout_marginBottom="@dimen/abc_dialog_padding_top_material" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_rate.xml b/app/src/main/res/layout/dialog_rate.xml
index 8971831cf..0446df02d 100644
--- a/app/src/main/res/layout/dialog_rate.xml
+++ b/app/src/main/res/layout/dialog_rate.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,28 +13,27 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:orientation="vertical"
     android:paddingLeft="16dp"
     android:paddingRight="16dp">
-    
+
     <TextView
         android:id="@+id/rating_text"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginBottom="16dp"
         android:gravity="center_horizontal"
-        android:textSize="@dimen/text_little_small"
-        android:textColor="?android:attr/textColorPrimary"/>
+        android:textColor="?android:attr/textColorPrimary"
+        android:textSize="@dimen/text_little_small" />
 
     <com.hippo.ehviewer.widget.GalleryRatingBar
         android:id="@+id/rating_view"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
-        android:theme="@style/RatingBarTheme"/>
+        android:theme="@style/RatingBarTheme" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/dialog_recycler_view.xml b/app/src/main/res/layout/dialog_recycler_view.xml
index d841fa7cc..42b227cf9 100644
--- a/app/src/main/res/layout/dialog_recycler_view.xml
+++ b/app/src/main/res/layout/dialog_recycler_view.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,10 +14,9 @@
   ~ limitations under the License.
   -->
 
-<com.hippo.easyrecyclerview.EasyRecyclerView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.easyrecyclerview.EasyRecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/Indicating"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingTop="@dimen/abc_dialog_padding_top_material"
-    android:paddingBottom="@dimen/abc_dialog_padding_top_material"
-    style="@style/Indicating"/>
+    android:paddingBottom="@dimen/abc_dialog_padding_top_material" />
diff --git a/app/src/main/res/layout/dialog_torrent_list.xml b/app/src/main/res/layout/dialog_torrent_list.xml
index 4f9f8ad95..cfc328402 100644
--- a/app/src/main/res/layout/dialog_torrent_list.xml
+++ b/app/src/main/res/layout/dialog_torrent_list.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:paddingTop="@dimen/abc_dialog_padding_top_material"
@@ -27,18 +25,18 @@
         style="@style/ProgressView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center"/>
+        android:layout_gravity="center" />
 
     <TextView
         android:id="@+id/text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:textAppearance="@style/TextAppearance.AppCompat.Medium"/>
+        android:textAppearance="@style/TextAppearance.AppCompat.Medium" />
 
     <ListView
         android:id="@+id/list_view"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="match_parent" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/gallery_detail_actions.xml b/app/src/main/res/layout/gallery_detail_actions.xml
index 741380609..f91818fd2 100644
--- a/app/src/main/res/layout/gallery_detail_actions.xml
+++ b/app/src/main/res/layout/gallery_detail_actions.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/actions"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -29,16 +27,16 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
+        android:clipToPadding="false"
         android:paddingLeft="@dimen/keyline_margin"
         android:paddingRight="@dimen/keyline_margin"
-        android:clipToPadding="false"
         android:scrollbars="none">
 
         <LinearLayout
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:orientation="horizontal"
             android:divider="@drawable/spacer_keyline"
+            android:orientation="horizontal"
             android:showDividers="middle">
 
             <FrameLayout
@@ -50,19 +48,19 @@
                     android:id="@+id/heart"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
+                    android:drawablePadding="8dp"
                     android:gravity="center_horizontal"
                     android:text="@string/favorited"
-                    android:drawablePadding="8dp"
-                    android:textColor="?android:attr/textColorPrimary"/>
+                    android:textColor="?android:attr/textColorPrimary" />
 
                 <TextView
                     android:id="@+id/heart_outline"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
+                    android:drawablePadding="8dp"
                     android:gravity="center_horizontal"
                     android:text="@string/not_favorited"
-                    android:drawablePadding="8dp"
-                    android:textColor="?android:attr/textColorPrimary"/>
+                    android:textColor="?android:attr/textColorPrimary" />
 
             </FrameLayout>
 
@@ -70,54 +68,54 @@
                 android:id="@+id/rate"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:drawablePadding="8dp"
                 android:gravity="center_horizontal"
                 android:text="@string/rate"
-                android:drawablePadding="8dp"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/share"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:drawablePadding="8dp"
                 android:gravity="center_horizontal"
                 android:text="@string/share"
-                android:drawablePadding="8dp"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/torrent"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:gravity="center_horizontal"
                 android:drawablePadding="8dp"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:gravity="center_horizontal"
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/archive"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:text="@string/archive"
-                android:gravity="center_horizontal"
                 android:drawablePadding="8dp"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:gravity="center_horizontal"
+                android:text="@string/archive"
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/similar"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:drawablePadding="8dp"
                 android:gravity="center_horizontal"
                 android:text="@string/similar_gallery"
-                android:drawablePadding="8dp"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/search_cover"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:drawablePadding="8dp"
                 android:gravity="center_horizontal"
                 android:text="@string/search_cover"
-                android:drawablePadding="8dp"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
         </LinearLayout>
     </HorizontalScrollView>
@@ -126,16 +124,16 @@
         android:id="@+id/rating"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="8dp"
         android:layout_gravity="center_horizontal"
+        android:layout_marginTop="8dp"
         android:isIndicator="true"
-        android:theme="@style/RatingBarTheme"/>
+        android:theme="@style/RatingBarTheme" />
 
     <TextView
         android:id="@+id/rating_text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
-        android:textColor="?android:attr/textColorPrimary"/>
+        android:textColor="?android:attr/textColorPrimary" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/gallery_detail_comments.xml b/app/src/main/res/layout/gallery_detail_comments.xml
index 958799e38..f7cb697eb 100644
--- a/app/src/main/res/layout/gallery_detail_comments.xml
+++ b/app/src/main/res/layout/gallery_detail_comments.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,14 +13,13 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/comments"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:divider="@drawable/spacer_keyline"
     android:orientation="vertical"
     android:padding="@dimen/keyline_margin"
-    android:divider="@drawable/spacer_keyline"
     android:showDividers="middle">
 
     <TextView
@@ -29,6 +27,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
-        android:textColor="?attr/textColorThemeAccent"/>
+        android:textColor="?attr/textColorThemeAccent" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/gallery_detail_content.xml b/app/src/main/res/layout/gallery_detail_content.xml
index 07839b7cc..a39e73e4b 100644
--- a/app/src/main/res/layout/gallery_detail_content.xml
+++ b/app/src/main/res/layout/gallery_detail_content.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,14 +14,12 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
 
-    <include
-        layout="@layout/gallery_detail_header"/>
+    <include layout="@layout/gallery_detail_header" />
 
     <FrameLayout
         android:layout_width="match_parent"
@@ -32,30 +29,24 @@
             android:id="@+id/below_header"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:orientation="vertical"
             android:divider="?attr/galleryDetailDivider"
-            android:showDividers="middle"
-            android:dividerPadding="@dimen/keyline_margin">
+            android:dividerPadding="@dimen/keyline_margin"
+            android:orientation="vertical"
+            android:showDividers="middle">
 
-            <include
-                layout="@layout/gallery_detail_info"/>
+            <include layout="@layout/gallery_detail_info" />
 
-            <include
-                layout="@layout/gallery_detail_actions"/>
+            <include layout="@layout/gallery_detail_actions" />
 
-            <include
-                layout="@layout/gallery_detail_tags"/>
+            <include layout="@layout/gallery_detail_tags" />
 
-            <include
-                layout="@layout/gallery_detail_comments"/>
+            <include layout="@layout/gallery_detail_comments" />
 
-            <include
-                layout="@layout/gallery_detail_previews"/>
+            <include layout="@layout/gallery_detail_previews" />
 
         </LinearLayout>
 
-        <include
-            layout="@layout/gallery_detail_progress"/>
+        <include layout="@layout/gallery_detail_progress" />
 
     </FrameLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/gallery_detail_header.xml b/app/src/main/res/layout/gallery_detail_header.xml
index d1fc6c1f8..2f5eaba60 100644
--- a/app/src/main/res/layout/gallery_detail_header.xml
+++ b/app/src/main/res/layout/gallery_detail_header.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/header"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
@@ -31,16 +29,16 @@
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="1"
-            android:background="?attr/galleryDetailHeaderBackgroundColor"/>
+            android:background="?attr/galleryDetailHeaderBackgroundColor" />
 
         <View
             android:layout_width="match_parent"
             android:layout_height="2dp"
-            android:background="@drawable/shadow_bottom"/>
+            android:background="@drawable/shadow_bottom" />
 
         <Space
             android:layout_width="match_parent"
-            android:layout_height="24dp"/>
+            android:layout_height="24dp" />
 
     </LinearLayout>
 
@@ -57,78 +55,76 @@
                 android:id="@+id/thumb"
                 android:layout_width="@dimen/gallery_detail_thumb_width"
                 android:layout_height="@dimen/gallery_detail_thumb_height"
-                android:layout_marginTop="@dimen/keyline_margin"
                 android:layout_marginLeft="@dimen/keyline_margin"
-                android:layout_marginBottom="@dimen/keyline_margin"/>
+                android:layout_marginTop="@dimen/keyline_margin"
+                android:layout_marginBottom="@dimen/keyline_margin" />
 
             <TextView
                 android:id="@+id/title"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_toRightOf="@id/thumb"
                 android:layout_alignTop="@id/thumb"
                 android:layout_marginLeft="@dimen/keyline_margin"
                 android:layout_marginRight="@dimen/keyline_margin"
-                android:textColor="@android:color/white"
-                android:textSize="@dimen/text_little_large"
+                android:layout_toRightOf="@id/thumb"
+                android:ellipsize="end"
                 android:maxLines="5"
-                android:ellipsize="end"/>
+                android:textColor="@android:color/white"
+                android:textSize="@dimen/text_little_large" />
 
             <TextView
                 android:id="@+id/uploader"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_alignLeft="@id/title"
                 android:layout_below="@id/title"
+                android:layout_alignLeft="@id/title"
                 android:layout_marginTop="8dp"
                 android:layout_marginRight="@dimen/keyline_margin"
-                android:textColor="?attr/galleryDetailHeaderTitleColor"
-                android:textSize="@dimen/text_little_small"
+                android:ellipsize="end"
                 android:singleLine="true"
-                android:ellipsize="end"/>
+                android:textColor="?attr/galleryDetailHeaderTitleColor"
+                android:textSize="@dimen/text_little_small" />
 
             <TextView
                 android:id="@+id/category"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_alignLeft="@id/title"
                 android:layout_below="@id/uploader"
+                android:layout_alignLeft="@id/title"
                 android:layout_marginTop="12dp"
                 android:layout_marginRight="@dimen/keyline_margin"
                 android:background="@android:color/white"
-                android:paddingLeft="8dp"
-                android:paddingRight="8dp"
-                android:paddingTop="2dp"
-                android:paddingBottom="2dp"
                 android:ellipsize="end"
+                android:paddingLeft="8dp"
+                android:paddingTop="2dp"
+                android:paddingRight="8dp"
+                android:paddingBottom="2dp"
                 android:singleLine="true"
                 android:textAllCaps="true"
-                android:textStyle="bold"/>
+                android:textStyle="bold" />
 
-            <ImageView
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+            <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
                 android:id="@+id/other_actions"
                 android:layout_width="48dp"
                 android:layout_height="56dp"
                 android:layout_alignParentTop="true"
                 android:layout_alignParentRight="true"
                 android:paddingLeft="12dp"
-                android:paddingRight="12dp"
                 android:paddingTop="16dp"
+                android:paddingRight="12dp"
                 android:paddingBottom="16dp"
-                app:srcCompat="@drawable/v_dots_vertical_secondary_dark_x24"/>
+                app:srcCompat="@drawable/v_dots_vertical_secondary_dark_x24" />
 
         </RelativeLayout>
 
-        <com.google.android.material.card.MaterialCardView
-            xmlns:app="http://schemas.android.com/apk/res-auto"
+        <com.google.android.material.card.MaterialCardView xmlns:app="http://schemas.android.com/apk/res-auto"
             android:id="@+id/action_card"
+            style="@style/CardView.Normal"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginLeft="@dimen/keyline_margin"
             android:layout_marginRight="@dimen/keyline_margin"
-            app:cardBackgroundColor="?attr/galleryDetailButtonBackgroundColor"
-            style="@style/CardView.Normal">
+            app:cardBackgroundColor="?attr/galleryDetailButtonBackgroundColor">
 
             <LinearLayout
                 android:layout_width="match_parent"
@@ -141,14 +137,14 @@
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
-                    android:textColor="?attr/textColorThemePrimary"/>
+                    android:textColor="?attr/textColorThemePrimary" />
 
                 <View
                     android:layout_width="1dp"
                     android:layout_height="match_parent"
-                    android:background="?attr/dividerColor"
                     android:layout_marginTop="8dp"
-                    android:layout_marginBottom="8dp"/>
+                    android:layout_marginBottom="8dp"
+                    android:background="?attr/dividerColor" />
 
                 <TextView
                     android:id="@+id/read"
@@ -156,8 +152,8 @@
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
-                    android:textColor="?attr/textColorThemeAccent"
-                    android:text="@string/read"/>
+                    android:text="@string/read"
+                    android:textColor="?attr/textColorThemeAccent" />
 
             </LinearLayout>
         </com.google.android.material.card.MaterialCardView>
diff --git a/app/src/main/res/layout/gallery_detail_info.xml b/app/src/main/res/layout/gallery_detail_info.xml
index 9b77faa45..073386c6a 100644
--- a/app/src/main/res/layout/gallery_detail_info.xml
+++ b/app/src/main/res/layout/gallery_detail_info.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,12 +14,11 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/info"
-    android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:orientation="vertical"
     android:padding="@dimen/keyline_margin">
 
     <TableLayout
@@ -30,6 +28,7 @@
         android:paddingRight="@dimen/keyline_margin">
 
         <TableRow>
+
             <TextView
                 android:id="@+id/language"
                 android:layout_width="0dp"
@@ -37,7 +36,7 @@
                 android:layout_weight="1"
                 android:gravity="left"
                 android:singleLine="true"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/pages"
@@ -45,7 +44,7 @@
                 android:layout_height="wrap_content"
                 android:gravity="center"
                 android:singleLine="true"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/size"
@@ -54,12 +53,11 @@
                 android:layout_weight="1"
                 android:gravity="right"
                 android:singleLine="true"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
         </TableRow>
 
-        <TableRow
-            android:paddingTop="8dp">
+        <TableRow android:paddingTop="8dp">
 
             <TextView
                 android:id="@+id/favoredTimes"
@@ -68,7 +66,7 @@
                 android:layout_weight="1"
                 android:gravity="left"
                 android:singleLine="true"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@+id/posted"
@@ -77,7 +75,7 @@
                 android:layout_weight="1"
                 android:gravity="right"
                 android:singleLine="true"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary" />
 
         </TableRow>
     </TableLayout>
@@ -88,6 +86,6 @@
         android:layout_gravity="center_horizontal"
         android:layout_marginTop="16dp"
         android:text="@string/more_information"
-        android:textColor="?attr/textColorThemeAccent"/>
+        android:textColor="?attr/textColorThemeAccent" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/gallery_detail_previews.xml b/app/src/main/res/layout/gallery_detail_previews.xml
index 1f01daac2..fd1739373 100644
--- a/app/src/main/res/layout/gallery_detail_previews.xml
+++ b/app/src/main/res/layout/gallery_detail_previews.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,29 +14,27 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/previews"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:divider="@drawable/spacer_keyline"
     android:orientation="vertical"
     android:padding="@dimen/keyline_margin"
-    android:divider="@drawable/spacer_keyline"
     android:showDividers="middle">
 
-    <com.hippo.widget.SimpleGridAutoSpanLayout
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.SimpleGridAutoSpanLayout xmlns:app="http://schemas.android.com/apk/res-auto"
         android:id="@+id/grid_layout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         app:columnCount="3"
-        app:itemMargin="8dp"/>
+        app:itemMargin="8dp" />
 
     <TextView
         android:id="@+id/preview_text"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
-        android:textColor="?attr/textColorThemeAccent"/>
+        android:textColor="?attr/textColorThemeAccent" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/gallery_detail_progress.xml b/app/src/main/res/layout/gallery_detail_progress.xml
index 90cc52b18..e2271ba0a 100644
--- a/app/src/main/res/layout/gallery_detail_progress.xml
+++ b/app/src/main/res/layout/gallery_detail_progress.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/progress"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
@@ -26,6 +24,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:layout_margin="@dimen/keyline_margin"/>
+        android:layout_margin="@dimen/keyline_margin" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/gallery_detail_tags.xml b/app/src/main/res/layout/gallery_detail_tags.xml
index dae995ef6..8d625be43 100644
--- a/app/src/main/res/layout/gallery_detail_tags.xml
+++ b/app/src/main/res/layout/gallery_detail_tags.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/tags"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
@@ -28,7 +26,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
-        android:textColor="?attr/textColorThemeAccent"
-        android:text="@string/no_tags"/>
+        android:text="@string/no_tags"
+        android:textColor="?attr/textColorThemeAccent" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/gallery_tag_group.xml b/app/src/main/res/layout/gallery_tag_group.xml
index 919ffa647..e98cd001d 100644
--- a/app/src/main/res/layout/gallery_tag_group.xml
+++ b/app/src/main/res/layout/gallery_tag_group.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,10 +14,9 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="horizontal"
     android:paddingLeft="@dimen/keyline_margin"
-    android:paddingRight="@dimen/keyline_margin"/>
+    android:paddingRight="@dimen/keyline_margin" />
diff --git a/app/src/main/res/layout/item_cute_spinner_item.xml b/app/src/main/res/layout/item_cute_spinner_item.xml
index 99b34f10d..aa9366cbc 100644
--- a/app/src/main/res/layout/item_cute_spinner_item.xml
+++ b/app/src/main/res/layout/item_cute_spinner_item.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,11 +14,10 @@
   ~ limitations under the License.
   -->
 
-<TextView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@android:id/text1"
     style="?attr/spinnerDropDownItemStyle"
-    android:singleLine="true"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:ellipsize="marquee"/>
+    android:ellipsize="marquee"
+    android:singleLine="true" />
diff --git a/app/src/main/res/layout/item_dir_explorer.xml b/app/src/main/res/layout/item_dir_explorer.xml
index 5acc2591b..4b6ad90ee 100644
--- a/app/src/main/res/layout/item_dir_explorer.xml
+++ b/app/src/main/res/layout/item_dir_explorer.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,10 +14,9 @@
   ~ limitations under the License.
   -->
 
-<TextView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/text"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:gravity="center_vertical"
-    android:padding="8dp"/>
+    android:padding="8dp" />
diff --git a/app/src/main/res/layout/item_download.xml b/app/src/main/res/layout/item_download.xml
index 4f3ac87d8..056d78b04 100644
--- a/app/src/main/res/layout/item_download.xml
+++ b/app/src/main/res/layout/item_download.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,129 +14,128 @@
   ~ limitations under the License.
   -->
 
-<androidx.cardview.widget.CardView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    style="@style/CardView.Reactive"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="2dp"
-    style="@style/CardView.Reactive">
+    android:layout_margin="2dp">
 
     <RelativeLayout
-      android:layout_width="match_parent"
-      android:layout_height="wrap_content">
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
 
         <com.hippo.ehviewer.widget.FixedThumb
-          android:id="@+id/thumb"
-          android:layout_width="@dimen/gallery_list_thumb_width"
-          android:layout_height="@dimen/gallery_list_thumb_height"
-          app:retryType="longClick"
-          app:minAspect="0.333"
-          app:maxAspect="1.333"/>
+            android:id="@+id/thumb"
+            android:layout_width="@dimen/gallery_list_thumb_width"
+            android:layout_height="@dimen/gallery_list_thumb_height"
+            app:maxAspect="1.333"
+            app:minAspect="0.333"
+            app:retryType="longClick" />
 
         <TextView
-          android:id="@+id/title"
-          style="@style/CardTitle"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignParentTop="true"
-          android:layout_marginLeft="8dp"
-          android:layout_marginRight="8dp"
-          android:layout_marginTop="4dp"
-          android:layout_toRightOf="@id/thumb"/>
+            android:id="@+id/title"
+            style="@style/CardTitle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentTop="true"
+            android:layout_marginLeft="8dp"
+            android:layout_marginTop="4dp"
+            android:layout_marginRight="8dp"
+            android:layout_toRightOf="@id/thumb" />
 
         <TextView
-          android:id="@+id/uploader"
-          style="@style/CardMessage"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignLeft="@id/title"
-          android:layout_below="@id/title"
-          android:layout_marginTop="2dp"/>
+            android:id="@+id/uploader"
+            style="@style/CardMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/title"
+            android:layout_alignLeft="@id/title"
+            android:layout_marginTop="2dp" />
 
         <com.hippo.ehviewer.widget.SimpleRatingView
-          android:id="@+id/rating"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignLeft="@id/title"
-          android:layout_below="@id/uploader"
-          android:layout_marginTop="2dp"/>
+            android:id="@+id/rating"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/uploader"
+            android:layout_alignLeft="@id/title"
+            android:layout_marginTop="2dp" />
 
         <TextView
-          android:id="@+id/category"
-          style="@style/CardMessage"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignLeft="@id/title"
-          android:layout_alignBottom="@id/thumb"
-          android:layout_marginBottom="8dp"
-          android:paddingBottom="2dp"
-          android:paddingLeft="8dp"
-          android:paddingRight="8dp"
-          android:paddingTop="2dp"
-          android:textColor="@android:color/white"
-          android:textAllCaps="true"/>
+            android:id="@+id/category"
+            style="@style/CardMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignLeft="@id/title"
+            android:layout_alignBottom="@id/thumb"
+            android:layout_marginBottom="8dp"
+            android:paddingLeft="8dp"
+            android:paddingTop="2dp"
+            android:paddingRight="8dp"
+            android:paddingBottom="2dp"
+            android:textAllCaps="true"
+            android:textColor="@android:color/white" />
 
         <FrameLayout
-          android:id="@+id/actions"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignBottom="@+id/thumb"
-          android:layout_alignParentRight="true"
-          android:paddingRight="8dp">
+            android:id="@+id/actions"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@+id/thumb"
+            android:layout_alignParentRight="true"
+            android:paddingRight="8dp">
 
             <ImageView
-              android:id="@+id/start"
-              android:layout_width="40dp"
-              android:layout_height="40dp"
-              android:padding="8dp"
-              app:srcCompat="@drawable/v_play_x24"/>
+                android:id="@+id/start"
+                android:layout_width="40dp"
+                android:layout_height="40dp"
+                android:padding="8dp"
+                app:srcCompat="@drawable/v_play_x24" />
 
             <ImageView
-              android:id="@+id/stop"
-              android:layout_width="40dp"
-              android:layout_height="40dp"
-              android:padding="8dp"
-              app:srcCompat="@drawable/v_pause_x24"/>
+                android:id="@+id/stop"
+                android:layout_width="40dp"
+                android:layout_height="40dp"
+                android:padding="8dp"
+                app:srcCompat="@drawable/v_pause_x24" />
 
         </FrameLayout>
 
         <TextView
-          android:id="@+id/state"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_above="@id/actions"
-          android:layout_marginBottom="4dp"
-          android:layout_alignParentRight="true"
-          android:paddingRight="16dp"
-          android:textColor="?attr/textColorThemeAccent"/>
+            android:id="@+id/state"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_above="@id/actions"
+            android:layout_alignParentRight="true"
+            android:layout_marginBottom="4dp"
+            android:paddingRight="16dp"
+            android:textColor="?attr/textColorThemeAccent" />
 
         <ProgressBar
-          android:id="@+id/progress_bar"
-          style="?android:attr/progressBarStyleHorizontal"
-          android:layout_width="match_parent"
-          android:layout_height="wrap_content"
-          android:layout_alignLeft="@id/title"
-          android:layout_marginRight="8dp"
-          android:layout_above="@id/actions"
-          android:indeterminate="false"/>
+            android:id="@+id/progress_bar"
+            style="?android:attr/progressBarStyleHorizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_above="@id/actions"
+            android:layout_alignLeft="@id/title"
+            android:layout_marginRight="8dp"
+            android:indeterminate="false" />
 
         <TextView
-          android:id="@+id/percent"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_above="@id/progress_bar"
-          android:layout_alignLeft="@id/title"
-          android:textSize="@dimen/text_super_small"/>
+            android:id="@+id/percent"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_above="@id/progress_bar"
+            android:layout_alignLeft="@id/title"
+            android:textSize="@dimen/text_super_small" />
 
         <TextView
-          android:id="@+id/speed"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_above="@id/progress_bar"
-          android:layout_alignParentRight="true"
-          android:layout_marginRight="8dp"
-          android:textSize="@dimen/text_super_small"/>
+            android:id="@+id/speed"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_above="@id/progress_bar"
+            android:layout_alignParentRight="true"
+            android:layout_marginRight="8dp"
+            android:textSize="@dimen/text_super_small" />
 
     </RelativeLayout>
 </androidx.cardview.widget.CardView>
diff --git a/app/src/main/res/layout/item_download_label.xml b/app/src/main/res/layout/item_download_label.xml
index 8991d4e66..dc449552e 100644
--- a/app/src/main/res/layout/item_download_label.xml
+++ b/app/src/main/res/layout/item_download_label.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:clipChildren="false">
@@ -25,49 +23,47 @@
         android:id="@+id/swipe_handler"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical"
-        android:background="?attr/contentColorPrimary">
+        android:background="?attr/contentColorPrimary"
+        android:orientation="vertical">
 
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="horizontal">
 
-            <ImageView
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+            <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
                 android:id="@+id/delete"
                 android:layout_width="48dp"
                 android:layout_height="48dp"
                 android:padding="12dp"
-                app:srcCompat="@drawable/v_delete_x24"/>
+                app:srcCompat="@drawable/v_delete_x24" />
 
             <TextView
                 android:id="@+id/label"
                 android:layout_width="0dp"
                 android:layout_height="48dp"
                 android:layout_weight="1"
+                android:ellipsize="end"
+                android:gravity="center_vertical"
                 android:paddingLeft="16dp"
                 android:paddingRight="16dp"
-                android:gravity="center_vertical"
                 android:singleLine="true"
-                android:ellipsize="end"
-                android:textSize="@dimen/text_little_small"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary"
+                android:textSize="@dimen/text_little_small" />
 
-            <ImageView
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+            <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
                 android:id="@+id/drag_handler"
                 android:layout_width="48dp"
                 android:layout_height="48dp"
                 android:padding="12dp"
-                app:srcCompat="@drawable/v_reorder_x24"/>
+                app:srcCompat="@drawable/v_reorder_x24" />
 
         </LinearLayout>
 
         <View
             android:layout_width="wrap_content"
             android:layout_height="1dp"
-            android:background="?attr/dividerColor"/>
+            android:background="?attr/dividerColor" />
 
     </com.hippo.widget.ShadowLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/item_drawer_favorites.xml b/app/src/main/res/layout/item_drawer_favorites.xml
index 96681525c..82ef49f73 100644
--- a/app/src/main/res/layout/item_drawer_favorites.xml
+++ b/app/src/main/res/layout/item_drawer_favorites.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,31 +14,30 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="horizontal"
+    android:background="?android:attr/selectableItemBackground"
     android:minHeight="?attr/listPreferredItemHeightSmall"
-    android:background="?android:attr/selectableItemBackground">
+    android:orientation="horizontal">
 
     <TextView
         android:id="@+id/key"
         android:layout_width="0dp"
         android:layout_height="match_parent"
         android:layout_weight="1"
-        android:textColor="?android:attr/textColorPrimary"
-        android:textAppearance="?attr/textAppearanceListItemSmall"
         android:gravity="center_vertical"
-        android:paddingLeft="?attr/listPreferredItemPaddingLeft"/>
+        android:paddingLeft="?attr/listPreferredItemPaddingLeft"
+        android:textAppearance="?attr/textAppearanceListItemSmall"
+        android:textColor="?android:attr/textColorPrimary" />
 
     <TextView
         android:id="@+id/value"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
-        android:textColor="?android:attr/textColorPrimary"
-        android:textAppearance="?attr/textAppearanceListItemSmall"
         android:gravity="center_vertical"
-        android:paddingRight="?attr/listPreferredItemPaddingRight"/>
+        android:paddingRight="?attr/listPreferredItemPaddingRight"
+        android:textAppearance="?attr/textAppearanceListItemSmall"
+        android:textColor="?android:attr/textColorPrimary" />
 
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_excluded_languages.xml b/app/src/main/res/layout/item_excluded_languages.xml
index 918c11d96..f1d51bfcd 100644
--- a/app/src/main/res/layout/item_excluded_languages.xml
+++ b/app/src/main/res/layout/item_excluded_languages.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="horizontal">
@@ -25,21 +23,21 @@
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_weight="1"
-        android:textColor="?android:attr/textColorPrimary"/>
+        android:textColor="?android:attr/textColorPrimary" />
 
     <com.hippo.widget.SensitiveCheckBox
         android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:layout_weight="1"/>
+        android:layout_weight="1" />
 
     <com.hippo.widget.SensitiveCheckBox
         android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:layout_weight="1"/>
+        android:layout_weight="1" />
 
     <com.hippo.widget.SensitiveCheckBox
         android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:layout_weight="1"/>
+        android:layout_weight="1" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_filter.xml b/app/src/main/res/layout/item_filter.xml
index e8d727933..485298785 100644
--- a/app/src/main/res/layout/item_filter.xml
+++ b/app/src/main/res/layout/item_filter.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:clipChildren="false">
@@ -24,41 +22,40 @@
     <com.hippo.widget.ShadowLinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical"
-        android:background="?attr/contentColorPrimary">
+        android:background="?attr/contentColorPrimary"
+        android:orientation="vertical">
 
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="horizontal">
 
-            <ImageView
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+            <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
                 android:id="@+id/icon"
                 android:layout_width="48dp"
                 android:layout_height="48dp"
                 android:padding="12dp"
-                app:srcCompat="@drawable/v_copy_x24"/>
+                app:srcCompat="@drawable/v_copy_x24" />
 
             <TextView
                 android:id="@+id/text"
                 android:layout_width="0dp"
                 android:layout_height="48dp"
                 android:layout_weight="1"
+                android:ellipsize="end"
+                android:gravity="center_vertical"
                 android:paddingLeft="16dp"
                 android:paddingRight="16dp"
-                android:gravity="center_vertical"
                 android:singleLine="true"
-                android:ellipsize="end"
-                android:textSize="@dimen/text_little_small"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary"
+                android:textSize="@dimen/text_little_small" />
 
         </LinearLayout>
 
         <View
             android:layout_width="wrap_content"
             android:layout_height="1dp"
-            android:background="?attr/dividerColor"/>
+            android:background="?attr/dividerColor" />
 
     </com.hippo.widget.ShadowLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/item_filter_header.xml b/app/src/main/res/layout/item_filter_header.xml
index 888f921ea..fc0018fec 100644
--- a/app/src/main/res/layout/item_filter_header.xml
+++ b/app/src/main/res/layout/item_filter_header.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,12 +14,11 @@
   ~ limitations under the License.
   -->
 
-<TextView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/text"
-    android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="8dp"
     android:textAppearance="@style/TextAppearance.AppCompat.Title"
-    android:textColor="?android:attr/textColorPrimary"
-    android:padding="8dp"/>
+    android:textColor="?android:attr/textColorPrimary" />
diff --git a/app/src/main/res/layout/item_gallery_comment.xml b/app/src/main/res/layout/item_gallery_comment.xml
index 288b65583..8a48140ba 100644
--- a/app/src/main/res/layout/item_gallery_comment.xml
+++ b/app/src/main/res/layout/item_gallery_comment.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,34 +14,33 @@
   ~ limitations under the License.
   -->
 
-<RelativeLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:paddingLeft="@dimen/keyline_margin"
-    android:paddingRight="@dimen/keyline_margin"
     android:paddingTop="8dp"
-    android:paddingBottom="8dp" >
+    android:paddingRight="@dimen/keyline_margin"
+    android:paddingBottom="8dp">
 
     <TextView
         android:id="@+id/user"
         android:layout_width="wrap_content"
-        android:layout_height="wrap_content"/>
+        android:layout_height="wrap_content" />
 
     <TextView
         android:id="@+id/time"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_alignParentRight="true"/>
+        android:layout_alignParentRight="true" />
 
     <com.hippo.widget.LinkifyTextView
         android:id="@+id/comment"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_alignLeft="@id/user"
         android:layout_below="@id/user"
+        android:layout_alignLeft="@id/user"
         android:layout_marginTop="8.0dp"
         android:ellipsize="end"
-        android:textColor="?android:attr/textColorPrimary"/>
+        android:textColor="?android:attr/textColorPrimary" />
 
 </RelativeLayout>
diff --git a/app/src/main/res/layout/item_gallery_comment_more.xml b/app/src/main/res/layout/item_gallery_comment_more.xml
index e2ff81779..9bd6c5fc1 100644
--- a/app/src/main/res/layout/item_gallery_comment_more.xml
+++ b/app/src/main/res/layout/item_gallery_comment_more.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2019 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:padding="@dimen/keyline_margin">
@@ -26,6 +24,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:text="@string/click_more_comments"/>
+        android:text="@string/click_more_comments" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/item_gallery_comment_progress.xml b/app/src/main/res/layout/item_gallery_comment_progress.xml
index 6fe4c4893..43c62908b 100644
--- a/app/src/main/res/layout/item_gallery_comment_progress.xml
+++ b/app/src/main/res/layout/item_gallery_comment_progress.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2019 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:padding="@dimen/keyline_margin">
@@ -26,6 +24,6 @@
         style="@style/ProgressView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center"/>
+        android:layout_gravity="center" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/item_gallery_grid.xml b/app/src/main/res/layout/item_gallery_grid.xml
index 84d5cc122..cc946a8c5 100644
--- a/app/src/main/res/layout/item_gallery_grid.xml
+++ b/app/src/main/res/layout/item_gallery_grid.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,39 +14,36 @@
   ~ limitations under the License.
   -->
 
-<com.google.android.material.card.MaterialCardView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    style="@style/CardView.Normal"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="2dp"
-    style="@style/CardView.Normal">
+    android:layout_margin="2dp">
 
-    <com.hippo.ehviewer.widget.TileThumb
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.ehviewer.widget.TileThumb xmlns:app="http://schemas.android.com/apk/res-auto"
         android:id="@+id/thumb"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:scaleType="centerCrop"
         android:foreground="@drawable/tile_background"
-        app:retryType="none"/>
+        android:scaleType="centerCrop"
+        app:retryType="none" />
 
     <TextView
         android:id="@+id/category"
         android:layout_width="32dp"
         android:layout_height="24dp"
-        android:layout_gravity="top|right"/>
+        android:layout_gravity="top|right" />
 
-    <TextView
-        xmlns:tools="http://schemas.android.com/tools"
+    <TextView xmlns:tools="http://schemas.android.com/tools"
         android:id="@+id/simple_language"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="top|right"
         android:layout_marginRight="2dp"
-        android:textSize="10dp"
         android:textColor="@android:color/white"
+        android:textSize="10dp"
         android:textStyle="bold"
-        tools:ignore="SpUsage"/>
+        tools:ignore="SpUsage" />
 
 </com.google.android.material.card.MaterialCardView>
diff --git a/app/src/main/res/layout/item_gallery_info_data.xml b/app/src/main/res/layout/item_gallery_info_data.xml
index b1a20a013..36e2aba32 100644
--- a/app/src/main/res/layout/item_gallery_info_data.xml
+++ b/app/src/main/res/layout/item_gallery_info_data.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="horizontal"
@@ -27,14 +25,14 @@
         android:id="@+id/key"
         android:layout_width="90dp"
         android:layout_height="wrap_content"
-        android:textColor="?android:attr/textColorPrimary"
-        android:padding="8dp"/>
+        android:padding="8dp"
+        android:textColor="?android:attr/textColorPrimary" />
 
     <TextView
         android:id="@+id/value"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textColor="?android:attr/textColorPrimary"
-        android:padding="8dp"/>
+        android:padding="8dp"
+        android:textColor="?android:attr/textColorPrimary" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_gallery_info_header.xml b/app/src/main/res/layout/item_gallery_info_header.xml
index f30497c82..c24f1377e 100644
--- a/app/src/main/res/layout/item_gallery_info_header.xml
+++ b/app/src/main/res/layout/item_gallery_info_header.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="horizontal"
@@ -27,14 +25,14 @@
         android:id="@+id/key"
         android:layout_width="90dp"
         android:layout_height="wrap_content"
-        android:textColor="?android:attr/textColorSecondary"
-        android:padding="8dp"/>
+        android:padding="8dp"
+        android:textColor="?android:attr/textColorSecondary" />
 
     <TextView
         android:id="@+id/value"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:textColor="?android:attr/textColorSecondary"
-        android:padding="8dp"/>
+        android:padding="8dp"
+        android:textColor="?android:attr/textColorSecondary" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_gallery_list.xml b/app/src/main/res/layout/item_gallery_list.xml
index 0a9f2d8a3..51d7d4d57 100644
--- a/app/src/main/res/layout/item_gallery_list.xml
+++ b/app/src/main/res/layout/item_gallery_list.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,116 +13,114 @@
   ~ limitations under the License.
   -->
 
-<com.google.android.material.card.MaterialCardView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    style="@style/CardView.Reactive"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="2dp"
-    style="@style/CardView.Reactive">
+    android:layout_margin="2dp">
 
     <RelativeLayout
-      android:layout_width="match_parent"
-      android:layout_height="wrap_content">
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
 
         <com.hippo.ehviewer.widget.FixedThumb
-          android:id="@+id/thumb"
-          android:layout_width="@dimen/gallery_list_thumb_width"
-          android:layout_height="@dimen/gallery_list_thumb_height"
-          app:retryType="click"
-          app:minAspect="0.333"
-          app:maxAspect="1.333"/>
+            android:id="@+id/thumb"
+            android:layout_width="@dimen/gallery_list_thumb_width"
+            android:layout_height="@dimen/gallery_list_thumb_height"
+            app:maxAspect="1.333"
+            app:minAspect="0.333"
+            app:retryType="click" />
 
         <TextView
-          android:id="@+id/title"
-          style="@style/CardTitle"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignParentTop="true"
-          android:layout_marginLeft="8dp"
-          android:layout_marginRight="8dp"
-          android:layout_marginTop="4dp"
-          android:layout_toRightOf="@id/thumb"/>
+            android:id="@+id/title"
+            style="@style/CardTitle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentTop="true"
+            android:layout_marginLeft="8dp"
+            android:layout_marginTop="4dp"
+            android:layout_marginRight="8dp"
+            android:layout_toRightOf="@id/thumb" />
 
         <TextView
-          android:id="@+id/uploader"
-          style="@style/CardMessage"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignLeft="@id/title"
-          android:layout_below="@id/title"
-          android:layout_marginTop="2dp"/>
+            android:id="@+id/uploader"
+            style="@style/CardMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@id/title"
+            android:layout_alignLeft="@id/title"
+            android:layout_marginTop="2dp" />
 
         <TextView
-          android:id="@+id/category"
-          style="@style/CardMessage"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignLeft="@id/title"
-          android:layout_alignBottom="@id/thumb"
-          android:layout_marginBottom="8dp"
-          android:paddingBottom="2dp"
-          android:paddingLeft="8dp"
-          android:paddingRight="8dp"
-          android:paddingTop="2dp"
-          android:textColor="@android:color/white"
-          android:textAllCaps="true"/>
+            android:id="@+id/category"
+            style="@style/CardMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignLeft="@id/title"
+            android:layout_alignBottom="@id/thumb"
+            android:layout_marginBottom="8dp"
+            android:paddingLeft="8dp"
+            android:paddingTop="2dp"
+            android:paddingRight="8dp"
+            android:paddingBottom="2dp"
+            android:textAllCaps="true"
+            android:textColor="@android:color/white" />
 
         <com.hippo.ehviewer.widget.SimpleRatingView
-          android:id="@+id/rating"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignLeft="@id/title"
-          android:layout_above="@id/category"
-          android:layout_marginBottom="4dp"/>
+            android:id="@+id/rating"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_above="@id/category"
+            android:layout_alignLeft="@id/title"
+            android:layout_marginBottom="4dp" />
 
         <TextView
-          android:id="@+id/posted"
-          style="@style/CardMessage"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:layout_alignBottom="@id/thumb"
-          android:layout_alignParentRight="true"
-          android:layout_marginRight="6dp"
-          android:layout_marginBottom="4dp"/>
+            android:id="@+id/posted"
+            style="@style/CardMessage"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignBottom="@id/thumb"
+            android:layout_alignParentRight="true"
+            android:layout_marginRight="6dp"
+            android:layout_marginBottom="4dp" />
 
-        <LinearLayout
-            xmlns:app="http://schemas.android.com/apk/res-auto"
+        <LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_above="@id/posted"
             android:layout_alignParentRight="true"
             android:layout_marginRight="6dp"
-            android:orientation="horizontal"
             android:divider="@drawable/spacer_x6"
-            android:showDividers="middle"
-            android:gravity="center_vertical">
+            android:gravity="center_vertical"
+            android:orientation="horizontal"
+            android:showDividers="middle">
 
             <ImageView
                 android:id="@+id/downloaded"
                 android:layout_width="16dp"
                 android:layout_height="16dp"
                 android:visibility="gone"
-                app:srcCompat="@drawable/v_download_x16"/>
+                app:srcCompat="@drawable/v_download_x16" />
 
             <ImageView
                 android:id="@+id/favourited"
                 android:layout_width="16dp"
                 android:layout_height="16dp"
                 android:visibility="gone"
-                app:srcCompat="@drawable/v_heart_x16"/>
+                app:srcCompat="@drawable/v_heart_x16" />
 
             <TextView
                 android:id="@+id/simple_language"
                 style="@style/CardMessage"
                 android:layout_width="wrap_content"
-                android:layout_height="wrap_content"/>
+                android:layout_height="wrap_content" />
 
             <TextView
                 android:id="@+id/pages"
                 style="@style/CardMessage"
                 android:layout_width="wrap_content"
-                android:layout_height="wrap_content"/>
+                android:layout_height="wrap_content" />
 
         </LinearLayout>
     </RelativeLayout>
diff --git a/app/src/main/res/layout/item_gallery_list_thumb_height.xml b/app/src/main/res/layout/item_gallery_list_thumb_height.xml
index c81e3215c..e9b20da10 100644
--- a/app/src/main/res/layout/item_gallery_list_thumb_height.xml
+++ b/app/src/main/res/layout/item_gallery_list_thumb_height.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,44 +14,43 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:layout_width="match_parent"
-  android:layout_height="wrap_content"
-  android:orientation="vertical">
-
-  <TextView
-    style="@style/CardTitle"
-    android:layout_width="wrap_content"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_marginTop="4dp"
-    android:lines="2"/>
+    android:orientation="vertical">
 
-  <TextView
-    style="@style/CardMessage"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_marginTop="2dp"
-    android:lines="1"/>
+    <TextView
+        style="@style/CardTitle"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="4dp"
+        android:lines="2" />
 
-  <com.hippo.ehviewer.widget.SimpleRatingView
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_marginTop="2dp"/>
+    <TextView
+        style="@style/CardMessage"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="2dp"
+        android:lines="1" />
 
-  <TextView
-    android:id="@+id/category"
-    style="@style/CardMessage"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_marginTop="4dp"
-    android:layout_marginBottom="8dp"
-    android:paddingBottom="2dp"
-    android:paddingLeft="8dp"
-    android:paddingRight="8dp"
-    android:paddingTop="2dp"
-    android:textColor="@android:color/white"
-    android:textAllCaps="true"
-    android:lines="1"/>
+    <com.hippo.ehviewer.widget.SimpleRatingView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="2dp" />
+
+    <TextView
+        android:id="@+id/category"
+        style="@style/CardMessage"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="4dp"
+        android:layout_marginBottom="8dp"
+        android:lines="1"
+        android:paddingLeft="8dp"
+        android:paddingTop="2dp"
+        android:paddingRight="8dp"
+        android:paddingBottom="2dp"
+        android:textAllCaps="true"
+        android:textColor="@android:color/white" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_gallery_preview.xml b/app/src/main/res/layout/item_gallery_preview.xml
index 9055836b1..76823450c 100644
--- a/app/src/main/res/layout/item_gallery_preview.xml
+++ b/app/src/main/res/layout/item_gallery_preview.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,26 +14,24 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical">
 
-    <com.hippo.ehviewer.widget.FixedThumb
-        xmlns:auto="http://schemas.android.com/apk/res-auto"
+    <com.hippo.ehviewer.widget.FixedThumb xmlns:auto="http://schemas.android.com/apk/res-auto"
         android:id="@+id/image"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         auto:aspect="0.667"
-        auto:retryType="longClick"
+        auto:maxAspect="0.8"
         auto:minAspect="0.5"
-        auto:maxAspect="0.8"/>
+        auto:retryType="longClick" />
 
     <TextView
         android:id="@+id/text"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:gravity="center"/>
+        android:gravity="center" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_gallery_tag.xml b/app/src/main/res/layout/item_gallery_tag.xml
index dda62e779..70c56f537 100644
--- a/app/src/main/res/layout/item_gallery_tag.xml
+++ b/app/src/main/res/layout/item_gallery_tag.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,14 +14,13 @@
   ~ limitations under the License.
   -->
 
-<TextView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
     style="@style/CardMessage"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_margin="4dp"
     android:paddingLeft="12dp"
-    android:paddingRight="12dp"
     android:paddingTop="4dp"
+    android:paddingRight="12dp"
     android:paddingBottom="4dp"
-    android:textColor="@android:color/white"/>
+    android:textColor="@android:color/white" />
diff --git a/app/src/main/res/layout/item_history.xml b/app/src/main/res/layout/item_history.xml
index 20c4715e3..136dc7299 100644
--- a/app/src/main/res/layout/item_history.xml
+++ b/app/src/main/res/layout/item_history.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,13 +14,12 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
     <include
-        layout="@layout/item_gallery_list"
-        android:id="@+id/card"/>
+        android:id="@+id/card"
+        layout="@layout/item_gallery_list" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/item_hosts.xml b/app/src/main/res/layout/item_hosts.xml
index f48e93707..5e3019b80 100644
--- a/app/src/main/res/layout/item_hosts.xml
+++ b/app/src/main/res/layout/item_hosts.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,26 +14,25 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:orientation="vertical"
-  android:layout_width="match_parent"
-  android:layout_height="wrap_content"
-  android:paddingLeft="@dimen/keyline_margin"
-  android:paddingRight="@dimen/keyline_margin"
-  android:paddingTop="8dp"
-  android:paddingBottom="8dp">
-
-  <TextView
-    android:id="@+id/host"
-    android:layout_width="wrap_content"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:textColor="?android:attr/textColorPrimary"/>
+    android:orientation="vertical"
+    android:paddingLeft="@dimen/keyline_margin"
+    android:paddingTop="8dp"
+    android:paddingRight="@dimen/keyline_margin"
+    android:paddingBottom="8dp">
 
-  <TextView
-    android:id="@+id/ip"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
-    android:layout_marginTop="8dp"/>
+    <TextView
+        android:id="@+id/host"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="?android:attr/textColorPrimary" />
+
+    <TextView
+        android:id="@+id/ip"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/item_preference_header.xml b/app/src/main/res/layout/item_preference_header.xml
index f2ddb7da0..effb7000b 100644
--- a/app/src/main/res/layout/item_preference_header.xml
+++ b/app/src/main/res/layout/item_preference_header.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,23 +14,22 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:background="?attr/preferenceHeaderBackground"
     android:gravity="center_vertical"
     android:minHeight="72dp"
-    android:orientation="horizontal"
-    android:background="?attr/preferenceHeaderBackground">
+    android:orientation="horizontal">
 
     <ImageView
         android:id="@android:id/icon"
         android:layout_width="24dp"
         android:layout_height="24dp"
-        android:scaleType="centerInside"
         android:layout_marginLeft="16dp"
         android:layout_marginRight="32dp"
-        android:contentDescription="@null"/>
+        android:contentDescription="@null"
+        android:scaleType="centerInside" />
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -48,16 +46,16 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_vertical"
-                android:singleLine="true"
-                android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                 android:ellipsize="marquee"
                 android:fadingEdge="horizontal"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:singleLine="true"
+                android:textAppearance="@style/TextAppearance.AppCompat.Medium"
+                android:textColor="?android:attr/textColorPrimary" />
 
             <TextView
                 android:id="@android:id/summary"
                 android:layout_width="wrap_content"
-                android:layout_height="wrap_content"/>
+                android:layout_height="wrap_content" />
 
         </FrameLayout>
 
diff --git a/app/src/main/res/layout/item_quick_search.xml b/app/src/main/res/layout/item_quick_search.xml
index 8991d4e66..dc449552e 100644
--- a/app/src/main/res/layout/item_quick_search.xml
+++ b/app/src/main/res/layout/item_quick_search.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2018 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:clipChildren="false">
@@ -25,49 +23,47 @@
         android:id="@+id/swipe_handler"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical"
-        android:background="?attr/contentColorPrimary">
+        android:background="?attr/contentColorPrimary"
+        android:orientation="vertical">
 
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="horizontal">
 
-            <ImageView
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+            <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
                 android:id="@+id/delete"
                 android:layout_width="48dp"
                 android:layout_height="48dp"
                 android:padding="12dp"
-                app:srcCompat="@drawable/v_delete_x24"/>
+                app:srcCompat="@drawable/v_delete_x24" />
 
             <TextView
                 android:id="@+id/label"
                 android:layout_width="0dp"
                 android:layout_height="48dp"
                 android:layout_weight="1"
+                android:ellipsize="end"
+                android:gravity="center_vertical"
                 android:paddingLeft="16dp"
                 android:paddingRight="16dp"
-                android:gravity="center_vertical"
                 android:singleLine="true"
-                android:ellipsize="end"
-                android:textSize="@dimen/text_little_small"
-                android:textColor="?android:attr/textColorPrimary"/>
+                android:textColor="?android:attr/textColorPrimary"
+                android:textSize="@dimen/text_little_small" />
 
-            <ImageView
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+            <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
                 android:id="@+id/drag_handler"
                 android:layout_width="48dp"
                 android:layout_height="48dp"
                 android:padding="12dp"
-                app:srcCompat="@drawable/v_reorder_x24"/>
+                app:srcCompat="@drawable/v_reorder_x24" />
 
         </LinearLayout>
 
         <View
             android:layout_width="wrap_content"
             android:layout_height="1dp"
-            android:background="?attr/dividerColor"/>
+            android:background="?attr/dividerColor" />
 
     </com.hippo.widget.ShadowLinearLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/item_select_dialog.xml b/app/src/main/res/layout/item_select_dialog.xml
index ffec2614a..b891cbabe 100644
--- a/app/src/main/res/layout/item_select_dialog.xml
+++ b/app/src/main/res/layout/item_select_dialog.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,15 +14,14 @@
   ~ limitations under the License.
   -->
 
-<TextView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@android:id/text1"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:minHeight="?attr/listPreferredItemHeightSmall"
-    android:textAppearance="?attr/textAppearanceListItemSmall"
-    android:textColor="?attr/textColorAlertDialogListItem"
+    android:ellipsize="marquee"
     android:gravity="center_vertical"
+    android:minHeight="?attr/listPreferredItemHeightSmall"
     android:paddingLeft="?attr/listPreferredItemPaddingLeft"
     android:paddingRight="?attr/listPreferredItemPaddingRight"
-    android:ellipsize="marquee"/>
+    android:textAppearance="?attr/textAppearanceListItemSmall"
+    android:textColor="?attr/textColorAlertDialogListItem" />
diff --git a/app/src/main/res/layout/item_simple_list.xml b/app/src/main/res/layout/item_simple_list.xml
index 53795f57a..c7b060f31 100644
--- a/app/src/main/res/layout/item_simple_list.xml
+++ b/app/src/main/res/layout/item_simple_list.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,13 +14,12 @@
   ~ limitations under the License.
   -->
 
-<TextView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@android:id/text1"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:textAppearance="?attr/textAppearanceListItemSmall"
     android:gravity="center_vertical"
+    android:minHeight="?attr/listPreferredItemHeightSmall"
     android:paddingLeft="?attr/listPreferredItemPaddingLeft"
     android:paddingRight="?attr/listPreferredItemPaddingRight"
-    android:minHeight="?attr/listPreferredItemHeightSmall" />
+    android:textAppearance="?attr/textAppearanceListItemSmall" />
diff --git a/app/src/main/res/layout/item_simple_list_2.xml b/app/src/main/res/layout/item_simple_list_2.xml
index 61b7ceb16..b90a28559 100644
--- a/app/src/main/res/layout/item_simple_list_2.xml
+++ b/app/src/main/res/layout/item_simple_list_2.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,15 +14,14 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:orientation="vertical"
     android:paddingLeft="?attr/listPreferredItemPaddingLeft"
-    android:paddingRight="?attr/listPreferredItemPaddingRight"
     android:paddingTop="8dp"
-    android:paddingBottom="8dp"
-    android:orientation="vertical">
+    android:paddingRight="?attr/listPreferredItemPaddingRight"
+    android:paddingBottom="8dp">
 
     <TextView
         android:id="@android:id/text1"
@@ -32,7 +30,7 @@
         android:layout_marginBottom="4dp"
         android:textAppearance="?attr/textAppearanceListItemSmall"
         android:textColor="?android:attr/textColorPrimary"
-        android:textSize="@dimen/text_little_small"/>
+        android:textSize="@dimen/text_little_small" />
 
     <TextView
         android:id="@android:id/text2"
@@ -40,6 +38,6 @@
         android:layout_height="wrap_content"
         android:textAppearance="?attr/textAppearanceListItemSmall"
         android:textColor="?android:attr/textColorSecondary"
-        android:textSize="@dimen/text_small"/>
+        android:textSize="@dimen/text_small" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/nav_header_main.xml b/app/src/main/res/layout/nav_header_main.xml
index a0cbf99aa..ab190ac90 100644
--- a/app/src/main/res/layout/nav_header_main.xml
+++ b/app/src/main/res/layout/nav_header_main.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,18 +14,17 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="160dp">
+    android:layout_height="160dp"
+    android:orientation="vertical">
 
     <ImageView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:src="@drawable/sadpanda_low_poly"
+        android:contentDescription="@null"
         android:scaleType="centerCrop"
-        android:contentDescription="@null"/>
+        android:src="@drawable/sadpanda_low_poly" />
 
     <com.hippo.widget.LoadImageView
         android:id="@+id/avatar"
@@ -34,7 +32,7 @@
         android:layout_height="64dp"
         android:layout_gravity="bottom"
         android:layout_marginLeft="16dp"
-        android:layout_marginBottom="48dp"/>
+        android:layout_marginBottom="48dp" />
 
     <TextView
         android:id="@+id/display_name"
@@ -43,7 +41,7 @@
         android:layout_gravity="bottom"
         android:layout_marginLeft="16dp"
         android:layout_marginBottom="16dp"
-        android:textSize="@dimen/text_small"
-        android:textColor="@android:color/white"/>
+        android:textColor="@android:color/white"
+        android:textSize="@dimen/text_small" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/preference_dialog_default_categories.xml b/app/src/main/res/layout/preference_dialog_default_categories.xml
index b82d462be..f000a94ae 100644
--- a/app/src/main/res/layout/preference_dialog_default_categories.xml
+++ b/app/src/main/res/layout/preference_dialog_default_categories.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,8 +15,7 @@
   -->
 
 
-<com.hippo.widget.IndicatingScrollView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.widget.IndicatingScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     style="@style/Indicating"
     android:layout_width="match_parent"
     android:layout_height="0dp"
@@ -29,6 +27,6 @@
         android:layout_height="wrap_content"
         android:paddingLeft="?attr/dialogPreferredPadding"
         android:paddingTop="@dimen/abc_dialog_padding_top_material"
-        android:paddingRight="?attr/dialogPreferredPadding"/>
+        android:paddingRight="?attr/dialogPreferredPadding" />
 
 </com.hippo.widget.IndicatingScrollView>
diff --git a/app/src/main/res/layout/preference_dialog_excluded_tag_namespaces.xml b/app/src/main/res/layout/preference_dialog_excluded_tag_namespaces.xml
index af1191434..c625822d9 100644
--- a/app/src/main/res/layout/preference_dialog_excluded_tag_namespaces.xml
+++ b/app/src/main/res/layout/preference_dialog_excluded_tag_namespaces.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<com.hippo.widget.IndicatingScrollView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.widget.IndicatingScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     style="@style/Indicating"
     android:layout_width="match_parent"
@@ -33,7 +31,7 @@
 
         <TableRow
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" >
+            android:layout_height="wrap_content">
 
             <CheckBox
                 android:id="@+id/tag_group_reclass"
@@ -41,7 +39,7 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="reclass"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
             <CheckBox
                 android:id="@+id/tag_group_language"
@@ -49,13 +47,13 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="language"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
         </TableRow>
 
         <TableRow
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" >
+            android:layout_height="wrap_content">
 
             <CheckBox
                 android:id="@+id/tag_group_parody"
@@ -63,7 +61,7 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="parody"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
             <CheckBox
                 android:id="@+id/tag_group_character"
@@ -71,13 +69,13 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="character"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
         </TableRow>
 
         <TableRow
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" >
+            android:layout_height="wrap_content">
 
             <CheckBox
                 android:id="@+id/tag_group_group"
@@ -85,7 +83,7 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="group"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
             <CheckBox
                 android:id="@+id/tag_group_artist"
@@ -93,13 +91,13 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="artist"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
         </TableRow>
 
         <TableRow
             android:layout_width="match_parent"
-            android:layout_height="wrap_content" >
+            android:layout_height="wrap_content">
 
             <CheckBox
                 android:id="@+id/tag_group_male"
@@ -107,7 +105,7 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="male"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
             <CheckBox
                 android:id="@+id/tag_group_female"
@@ -115,7 +113,7 @@
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:text="female"
-                tools:ignore="HardcodedText"/>
+                tools:ignore="HardcodedText" />
 
         </TableRow>
     </TableLayout>
diff --git a/app/src/main/res/layout/preference_dialog_proxy.xml b/app/src/main/res/layout/preference_dialog_proxy.xml
index e28c34618..834004f0c 100644
--- a/app/src/main/res/layout/preference_dialog_proxy.xml
+++ b/app/src/main/res/layout/preference_dialog_proxy.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,11 +14,10 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:orientation="vertical"
     android:paddingLeft="?attr/dialogPreferredPadding"
     android:paddingTop="18dp"
     android:paddingRight="?attr/dialogPreferredPadding">
@@ -28,9 +26,9 @@
         android:id="@+id/type"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:entries="@array/proxy_types"
         android:paddingTop="8dp"
-        android:paddingBottom="8dp"
-        android:entries="@array/proxy_types"/>
+        android:paddingBottom="8dp" />
 
     <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/ip_input_layout"
@@ -42,7 +40,7 @@
             android:id="@+id/ip"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:inputType="text"/>
+            android:inputType="text" />
 
     </com.google.android.material.textfield.TextInputLayout>
 
@@ -56,7 +54,7 @@
             android:id="@+id/port"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:inputType="numberDecimal"/>
+            android:inputType="numberDecimal" />
 
     </com.google.android.material.textfield.TextInputLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/preference_dialog_task.xml b/app/src/main/res/layout/preference_dialog_task.xml
index a59347ccb..94bc7a23a 100644
--- a/app/src/main/res/layout/preference_dialog_task.xml
+++ b/app/src/main/res/layout/preference_dialog_task.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,26 +14,25 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="horizontal"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:orientation="horizontal"
     android:paddingLeft="?attr/dialogPreferredPadding"
     android:paddingTop="@dimen/abc_dialog_padding_top_material"
-    android:paddingBottom="@dimen/abc_dialog_padding_top_material"
-    android:paddingRight="?attr/dialogPreferredPadding">
+    android:paddingRight="?attr/dialogPreferredPadding"
+    android:paddingBottom="@dimen/abc_dialog_padding_top_material">
 
     <com.hippo.widget.ProgressView
+        style="@style/ProgressView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center_vertical"
-        style="@style/ProgressView"/>
+        android:layout_gravity="center_vertical" />
 
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
-        android:text="@string/please_wait"/>
+        android:text="@string/please_wait" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/preference_widget_fixed_switch.xml b/app/src/main/res/layout/preference_widget_fixed_switch.xml
index f84ff37ff..b87044193 100644
--- a/app/src/main/res/layout/preference_widget_fixed_switch.xml
+++ b/app/src/main/res/layout/preference_widget_fixed_switch.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -17,11 +16,10 @@
 
 <!-- Layout used by SwitchPreference for the switch widget style. This is inflated
      inside android.R.layout.preference. -->
-<androidx.appcompat.widget.SwitchCompat
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.appcompat.widget.SwitchCompat xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/switchWidget"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_gravity="center"
-    android:padding="16dp"
-    android:focusable="false"/>
+    android:focusable="false"
+    android:padding="16dp" />
diff --git a/app/src/main/res/layout/progress_dialog_material.xml b/app/src/main/res/layout/progress_dialog_material.xml
index 443d88acf..34b79f1bc 100644
--- a/app/src/main/res/layout/progress_dialog_material.xml
+++ b/app/src/main/res/layout/progress_dialog_material.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
      Copyright (C) 2014 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
@@ -21,10 +20,10 @@
 
     <LinearLayout
         android:id="@+id/body"
-        android:orientation="horizontal"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:baselineAligned="false"
+        android:orientation="horizontal"
         android:paddingLeft="?attr/dialogPreferredPadding"
         android:paddingTop="@dimen/dialog_padding_top_material"
         android:paddingRight="?attr/dialogPreferredPadding"
@@ -35,8 +34,8 @@
             style="?android:attr/progressBarStyle"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:max="10000"
-            android:layout_marginRight="?attr/dialogPreferredPadding" />
+            android:layout_marginRight="?attr/dialogPreferredPadding"
+            android:max="10000" />
 
         <TextView
             android:id="@+id/message"
diff --git a/app/src/main/res/layout/scene_analytics.xml b/app/src/main/res/layout/scene_analytics.xml
index 9d95b872d..4a7091579 100644
--- a/app/src/main/res/layout/scene_analytics.xml
+++ b/app/src/main/res/layout/scene_analytics.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,43 +14,41 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="@dimen/keyline_margin"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:padding="@dimen/keyline_margin">
 
     <ImageView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:padding="@dimen/keyline_margin"
-        app:srcCompat="@drawable/v_chart_accent_x48"/>
+        app:srcCompat="@drawable/v_chart_accent_x48" />
 
-    <com.hippo.widget.MaxSizeContainer
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.MaxSizeContainer xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_width="wrap_content"
         android:layout_height="0dp"
-        android:layout_weight="1"
         android:layout_gravity="center_horizontal"
+        android:layout_weight="1"
         app:maxWidth="@dimen/single_max_width">
 
         <ScrollView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:clipToPadding="false"
             android:paddingTop="@dimen/keyline_margin"
-            android:paddingBottom="@dimen/keyline_margin"
-            android:clipToPadding="false">
+            android:paddingBottom="@dimen/keyline_margin">
 
             <TextView
                 android:id="@+id/text"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:lineSpacingExtra="8dp"
                 android:textColor="?android:attr/textColorPrimary"
-                android:textSize="@dimen/text_little_small"
-                android:lineSpacingExtra="8dp"/>
+                android:textSize="@dimen/text_little_small" />
 
         </ScrollView>
 
@@ -59,15 +56,15 @@
 
     <LinearLayout
         android:id="@+id/buttonPanel"
+        style="?attr/buttonBarStyle"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:gravity="bottom"
         android:orientation="horizontal"
         android:paddingLeft="12dp"
-        android:paddingRight="12dp"
         android:paddingTop="4dp"
-        android:paddingBottom="4dp"
-        android:gravity="bottom"
-        style="?attr/buttonBarStyle">
+        android:paddingRight="12dp"
+        android:paddingBottom="4dp">
 
         <Button
             android:id="@+id/reject"
@@ -75,9 +72,9 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
+            android:text="@string/reject"
             android:textColor="?attr/colorAccent"
-            android:textStyle="bold"
-            android:text="@string/reject"/>
+            android:textStyle="bold" />
 
         <Button
             android:id="@+id/accept"
@@ -85,9 +82,9 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
+            android:text="@string/accept"
             android:textColor="?attr/colorPrimary"
-            android:textStyle="bold"
-            android:text="@string/accept"/>
+            android:textStyle="bold" />
 
     </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/scene_cookie_sign_in.xml b/app/src/main/res/layout/scene_cookie_sign_in.xml
index 1f3c31f2b..2a95008da 100644
--- a/app/src/main/res/layout/scene_cookie_sign_in.xml
+++ b/app/src/main/res/layout/scene_cookie_sign_in.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,37 +14,34 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="@dimen/keyline_margin"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:padding="@dimen/keyline_margin">
 
-    <ImageView
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:padding="@dimen/keyline_margin"
-        app:srcCompat="@drawable/v_cookie_brown_x48"/>
+        app:srcCompat="@drawable/v_cookie_brown_x48" />
 
-    <com.hippo.widget.MaxSizeContainer
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.MaxSizeContainer xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_width="wrap_content"
         android:layout_height="0dp"
-        android:layout_weight="1"
         android:layout_gravity="center_horizontal"
+        android:layout_weight="1"
         app:maxWidth="@dimen/single_max_width">
 
         <ScrollView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:clipToPadding="false"
             android:paddingTop="@dimen/keyline_margin"
-            android:paddingBottom="@dimen/keyline_margin"
-            android:clipToPadding="false">
+            android:paddingBottom="@dimen/keyline_margin">
 
             <LinearLayout
                 android:layout_width="match_parent"
@@ -57,7 +53,7 @@
                     android:layout_height="wrap_content"
                     android:text="@string/cookie_explain"
                     android:textColor="?android:attr/textColorPrimary"
-                    android:textSize="@dimen/text_little_small"/>
+                    android:textSize="@dimen/text_little_small" />
 
                 <com.google.android.material.textfield.TextInputLayout
                     android:id="@+id/ipb_member_id_layout"
@@ -65,8 +61,8 @@
                     android:layout_height="wrap_content"
                     android:layout_gravity="center_horizontal"
                     android:layout_marginTop="@dimen/keyline_margin"
-                    android:minWidth="@dimen/single_max_width"
-                    android:hint="ipb_member_id">
+                    android:hint="ipb_member_id"
+                    android:minWidth="@dimen/single_max_width">
 
                     <com.hippo.widget.HackyTextInputEditText
                         android:id="@+id/ipb_member_id"
@@ -76,7 +72,7 @@
                         android:inputType="text"
                         android:maxLines="1"
                         android:singleLine="true"
-                        tools:ignore="HardcodedText"/>
+                        tools:ignore="HardcodedText" />
 
                 </com.google.android.material.textfield.TextInputLayout>
 
@@ -85,8 +81,8 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="center_horizontal"
-                    android:minWidth="@dimen/single_max_width"
-                    android:hint="ipb_pass_hash">
+                    android:hint="ipb_pass_hash"
+                    android:minWidth="@dimen/single_max_width">
 
                     <com.hippo.widget.HackyTextInputEditText
                         android:id="@+id/ipb_pass_hash"
@@ -96,7 +92,7 @@
                         android:inputType="text"
                         android:maxLines="1"
                         android:singleLine="true"
-                        tools:ignore="HardcodedText"/>
+                        tools:ignore="HardcodedText" />
 
                 </com.google.android.material.textfield.TextInputLayout>
 
@@ -105,8 +101,8 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="center_horizontal"
-                    android:minWidth="@dimen/single_max_width"
-                    android:hint="igneous">
+                    android:hint="igneous"
+                    android:minWidth="@dimen/single_max_width">
 
                     <com.hippo.widget.HackyTextInputEditText
                         android:id="@+id/igneous"
@@ -125,20 +121,20 @@
 
     <LinearLayout
         android:id="@+id/buttonPanel"
+        style="?attr/buttonBarStyle"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:gravity="bottom"
         android:orientation="horizontal"
         android:paddingLeft="12dp"
-        android:paddingRight="12dp"
         android:paddingTop="4dp"
-        android:paddingBottom="4dp"
-        android:gravity="bottom"
-        style="?attr/buttonBarStyle">
+        android:paddingRight="12dp"
+        android:paddingBottom="4dp">
 
         <View
             android:layout_width="0dp"
             android:layout_height="0dp"
-            android:layout_weight="1"/>
+            android:layout_weight="1" />
 
         <Button
             android:id="@+id/ok"
@@ -146,9 +142,9 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
+            android:text="@android:string/ok"
             android:textColor="?attr/colorPrimary"
-            android:textStyle="bold"
-            android:text="@android:string/ok"/>
+            android:textStyle="bold" />
 
     </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/scene_download.xml b/app/src/main/res/layout/scene_download.xml
index 9a0b8d460..85cf107d5 100644
--- a/app/src/main/res/layout/scene_download.xml
+++ b/app/src/main/res/layout/scene_download.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -28,7 +26,7 @@
         <com.hippo.easyrecyclerview.EasyRecyclerView
             android:id="@+id/recycler_view"
             android:layout_width="match_parent"
-            android:layout_height="match_parent"/>
+            android:layout_height="match_parent" />
 
         <com.hippo.easyrecyclerview.FastScroller
             android:id="@+id/fast_scroller"
@@ -36,24 +34,23 @@
             android:layout_height="match_parent"
             android:layout_gravity="right"
             android:paddingLeft="20dp"
-            android:paddingRight="4dp"
             android:paddingTop="8dp"
-            android:paddingBottom="8dp"/>
+            android:paddingRight="4dp"
+            android:paddingBottom="8dp" />
 
     </FrameLayout>
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="16dp"
-        android:text="@string/no_download_info"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal"
+        android:text="@string/no_download_info" />
 
-    <com.hippo.widget.FabLayout
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.FabLayout xmlns:app="http://schemas.android.com/apk/res-auto"
         android:id="@+id/fab_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -61,46 +58,52 @@
         android:paddingBottom="@dimen/corner_fab_margin">
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_check_all_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_check_all_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_play_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_play_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_pause_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_pause_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_delete_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_delete_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_folder_move_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_folder_move_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_close_dark_x24"
             app:backgroundTint="?attr/widgetColorThemePrimary"
-            style="@style/Widget.Design.FloatingActionButton"/>
+            app:srcCompat="@drawable/v_close_dark_x24"
+            app:tint="#fff" />
 
     </com.hippo.widget.FabLayout>
 
diff --git a/app/src/main/res/layout/scene_excluded_languages.xml b/app/src/main/res/layout/scene_excluded_languages.xml
index 5e9ce4471..7bc7e7843 100644
--- a/app/src/main/res/layout/scene_excluded_languages.xml
+++ b/app/src/main/res/layout/scene_excluded_languages.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
@@ -26,8 +24,8 @@
         android:layout_height="wrap_content"
         android:orientation="horizontal"
         android:paddingLeft="@dimen/keyline_margin"
-        android:paddingRight="@dimen/keyline_margin"
-        android:paddingTop="8dp">
+        android:paddingTop="8dp"
+        android:paddingRight="@dimen/keyline_margin">
 
         <TextView
             android:id="@+id/cancel"
@@ -36,14 +34,14 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:gravity="center"
-            android:text="@android:string/cancel"/>
+            android:text="@android:string/cancel" />
 
         <View
             android:layout_width="1dp"
             android:layout_height="match_parent"
             android:layout_marginTop="8dp"
             android:layout_marginBottom="8dp"
-            android:background="?attr/dividerColor"/>
+            android:background="?attr/dividerColor" />
 
         <TextView
             android:id="@+id/ok"
@@ -52,7 +50,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:gravity="center"
-            android:text="@android:string/ok"/>
+            android:text="@android:string/ok" />
 
     </LinearLayout>
 
@@ -61,8 +59,8 @@
         android:layout_height="wrap_content"
         android:orientation="horizontal"
         android:paddingLeft="@dimen/keyline_margin"
-        android:paddingRight="@dimen/keyline_margin"
-        android:paddingTop="8dp">
+        android:paddingTop="8dp"
+        android:paddingRight="@dimen/keyline_margin">
 
         <TextView
             android:id="@+id/select_all"
@@ -71,14 +69,14 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:gravity="center"
-            android:text="@string/select_all"/>
+            android:text="@string/select_all" />
 
         <View
             android:layout_width="1dp"
             android:layout_height="match_parent"
             android:layout_marginTop="8dp"
             android:layout_marginBottom="8dp"
-            android:background="?attr/dividerColor"/>
+            android:background="?attr/dividerColor" />
 
         <TextView
             android:id="@+id/deselect_all"
@@ -87,14 +85,14 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:gravity="center"
-            android:text="@string/deselect_all"/>
+            android:text="@string/deselect_all" />
 
         <View
             android:layout_width="1dp"
             android:layout_height="match_parent"
             android:layout_marginTop="8dp"
             android:layout_marginBottom="8dp"
-            android:background="?attr/dividerColor"/>
+            android:background="?attr/dividerColor" />
 
         <TextView
             android:id="@+id/invert_selection"
@@ -103,43 +101,42 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:gravity="center"
-            android:text="@string/invert_selection"/>
+            android:text="@string/invert_selection" />
 
     </LinearLayout>
 
-    <LinearLayout
-        xmlns:android="http://schemas.android.com/apk/res/android"
+    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal"
         android:paddingLeft="@dimen/keyline_margin"
-        android:paddingRight="@dimen/keyline_margin"
         android:paddingTop="8dp"
+        android:paddingRight="@dimen/keyline_margin"
         android:paddingBottom="8dp">
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="@string/language"/>
+            android:text="@string/language" />
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="@string/original"/>
+            android:text="@string/original" />
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="@string/translated"/>
+            android:text="@string/translated" />
 
         <TextView
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:text="@string/rewrite"/>
+            android:text="@string/rewrite" />
 
     </LinearLayout>
 
@@ -148,7 +145,7 @@
         android:layout_height="1dp"
         android:layout_marginLeft="@dimen/keyline_margin"
         android:layout_marginRight="@dimen/keyline_margin"
-        android:background="?attr/dividerColor"/>
+        android:background="?attr/dividerColor" />
 
     <com.hippo.easyrecyclerview.EasyRecyclerView
         android:id="@+id/recycler_view"
@@ -157,6 +154,6 @@
         android:layout_weight="1"
         android:paddingLeft="@dimen/keyline_margin"
         android:paddingRight="@dimen/keyline_margin"
-        android:paddingBottom="8dp"/>
+        android:paddingBottom="8dp" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/scene_favorites.xml b/app/src/main/res/layout/scene_favorites.xml
index 89727bfc4..26863331f 100644
--- a/app/src/main/res/layout/scene_favorites.xml
+++ b/app/src/main/res/layout/scene_favorites.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/main_layout"
     android:layout_width="match_parent"
@@ -25,19 +23,18 @@
     <com.hippo.widget.ContentLayout
         android:id="@+id/content_layout"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="match_parent" />
 
     <com.hippo.ehviewer.widget.SearchBar
         android:id="@+id/search_bar"
+        style="@style/CardView.Normal"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginLeft="@dimen/gallery_search_bar_margin_h"
-        android:layout_marginRight="@dimen/gallery_search_bar_margin_h"
         android:layout_marginTop="@dimen/gallery_search_bar_margin_v"
-        style="@style/CardView.Normal"/>
+        android:layout_marginRight="@dimen/gallery_search_bar_margin_h" />
 
-    <com.hippo.widget.FabLayout
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.FabLayout xmlns:app="http://schemas.android.com/apk/res-auto"
         android:id="@+id/fab_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -45,48 +42,54 @@
         android:paddingBottom="@dimen/corner_fab_margin">
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_go_to_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_go_to_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_refresh_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_refresh_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_download_dark_x24"
+            android:visibility="gone"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"
-            android:visibility="gone"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_download_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_delete_dark_x24"
+            android:visibility="gone"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"
-            android:visibility="gone"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_delete_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_folder_move_dark_x24"
+            android:visibility="gone"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"
-            android:visibility="gone"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_folder_move_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             app:backgroundTint="?attr/widgetColorThemePrimary"
-            style="@style/Widget.Design.FloatingActionButton"/>
+            app:tint="#fff" />
 
     </com.hippo.widget.FabLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/scene_gallery_comments.xml b/app/src/main/res/layout/scene_gallery_comments.xml
index 9116f26fb..5e870c73f 100644
--- a/app/src/main/res/layout/scene_gallery_comments.xml
+++ b/app/src/main/res/layout/scene_gallery_comments.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,67 +14,66 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
 
     <com.hippo.easyrecyclerview.EasyRecyclerView
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:clipToPadding="false"/>
+        android:clipToPadding="false" />
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="8dp"
-        android:text="@string/no_one_comments_gallery"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal"
+        android:text="@string/no_one_comments_gallery" />
 
     <com.hippo.reveal.RevealLinearLayout
         android:id="@+id/edit_panel"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical"
         android:layout_gravity="bottom"
+        android:orientation="vertical"
         android:visibility="invisible">
 
         <View
             android:layout_width="match_parent"
             android:layout_height="4dp"
-            android:background="@drawable/shadow_top"/>
+            android:background="@drawable/shadow_top" />
 
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:orientation="horizontal"
-            android:background="?attr/contentColorThemePrimary">
+            android:background="?attr/contentColorThemePrimary"
+            android:orientation="horizontal">
 
             <EditText
                 android:id="@+id/edit_text"
-                android:theme="@style/CommentEditText"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
-                android:minHeight="56dp"
-                android:maxHeight="112dp"
-                android:gravity="left|center_vertical"
                 android:background="@null"
+                android:gravity="left|center_vertical"
+                android:inputType="textMultiLine"
+                android:maxHeight="112dp"
+                android:minHeight="56dp"
                 android:padding="@dimen/keyline_margin"
-                android:inputType="textMultiLine"/>
+                android:theme="@style/CommentEditText" />
 
             <ImageView
                 android:id="@+id/send"
                 android:layout_width="56dp"
                 android:layout_height="56dp"
                 android:layout_gravity="bottom"
-                android:padding="16dp"/>
+                android:padding="16dp" />
 
         </LinearLayout>
     </com.hippo.reveal.RevealLinearLayout>
@@ -87,14 +85,14 @@
         android:paddingRight="@dimen/corner_fab_margin"
         android:paddingBottom="@dimen/corner_fab_margin">
 
-        <com.google.android.material.floatingactionbutton.FloatingActionButton
-            xmlns:app="http://schemas.android.com/apk/res-auto"
+        <com.google.android.material.floatingactionbutton.FloatingActionButton xmlns:app="http://schemas.android.com/apk/res-auto"
             android:id="@+id/fab"
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_reply_dark_x24"
             app:backgroundTint="?attr/widgetColorThemePrimary"
-            style="@style/Widget.Design.FloatingActionButton"/>
+            app:srcCompat="@drawable/v_reply_dark_x24"
+            app:tint="#fff" />
 
     </com.hippo.widget.FabLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/scene_gallery_detail.xml b/app/src/main/res/layout/scene_gallery_detail.xml
index 62204b076..5768e6354 100644
--- a/app/src/main/res/layout/scene_gallery_detail.xml
+++ b/app/src/main/res/layout/scene_gallery_detail.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/main"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -25,11 +23,10 @@
         android:id="@+id/scroll_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:scrollbars="none"
-        android:overScrollMode="never">
+        android:overScrollMode="never"
+        android:scrollbars="none">
 
-        <include
-            layout="@layout/gallery_detail_content"/>
+        <include layout="@layout/gallery_detail_content" />
 
     </ScrollView>
 
@@ -38,15 +35,15 @@
         style="@style/ProgressView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center"/>
+        android:layout_gravity="center" />
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="8dp"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/scene_gallery_info.xml b/app/src/main/res/layout/scene_gallery_info.xml
index 57779664a..4c49787cc 100644
--- a/app/src/main/res/layout/scene_gallery_info.xml
+++ b/app/src/main/res/layout/scene_gallery_info.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,10 +14,9 @@
   ~ limitations under the License.
   -->
 
-<com.hippo.easyrecyclerview.EasyRecyclerView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.easyrecyclerview.EasyRecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/recycler_view"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingTop="@dimen/keyline_margin"
-    android:paddingBottom="@dimen/keyline_margin"/>
+    android:paddingBottom="@dimen/keyline_margin" />
diff --git a/app/src/main/res/layout/scene_gallery_list.xml b/app/src/main/res/layout/scene_gallery_list.xml
index d982c6bb7..9bbf009e7 100644
--- a/app/src/main/res/layout/scene_gallery_list.xml
+++ b/app/src/main/res/layout/scene_gallery_list.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/main_layout"
     android:layout_width="match_parent"
@@ -25,24 +23,23 @@
     <com.hippo.widget.ContentLayout
         android:id="@+id/content_layout"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="match_parent" />
 
     <com.hippo.ehviewer.widget.SearchLayout
         android:id="@+id/search_layout"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="match_parent" />
 
     <com.hippo.ehviewer.widget.SearchBar
         android:id="@+id/search_bar"
+        style="@style/CardView.Normal"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginLeft="@dimen/gallery_search_bar_margin_h"
-        android:layout_marginRight="@dimen/gallery_search_bar_margin_h"
         android:layout_marginTop="@dimen/gallery_search_bar_margin_v"
-        style="@style/CardView.Normal"/>
+        android:layout_marginRight="@dimen/gallery_search_bar_margin_h" />
 
-    <com.hippo.widget.FabLayout
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.FabLayout xmlns:app="http://schemas.android.com/apk/res-auto"
         android:id="@+id/fab_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -50,29 +47,31 @@
         android:paddingBottom="@dimen/corner_fab_margin">
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_go_to_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_go_to_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_refresh_dark_x24"
             app:backgroundTint="?attr/widgetColorThemeAccent"
-            style="@style/Widget.Design.FloatingActionButton.Mini"/>
+            app:fabSize="mini"
+            app:srcCompat="@drawable/v_refresh_dark_x24" />
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             app:backgroundTint="?attr/widgetColorThemePrimary"
-            style="@style/Widget.Design.FloatingActionButton"/>
+            app:tint="#fff" />
 
     </com.hippo.widget.FabLayout>
 
-    <com.hippo.widget.FabLayout
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.FabLayout xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:paddingRight="@dimen/corner_fab_margin"
@@ -80,14 +79,15 @@
 
         <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:id="@+id/search_fab"
+            style="@style/Widget.MaterialComponents.FloatingActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:srcCompat="@drawable/v_magnify_dark_x24"
-            app:backgroundTint="?attr/widgetColorThemeAccent"
-            android:visibility="invisible"
             android:scaleX="0"
             android:scaleY="0"
-            style="@style/Widget.Design.FloatingActionButton"/>
+            android:visibility="invisible"
+            app:backgroundTint="?attr/widgetColorThemeAccent"
+            app:srcCompat="@drawable/v_magnify_dark_x24"
+            app:tint="#fff" />
 
     </com.hippo.widget.FabLayout>
 </FrameLayout>
diff --git a/app/src/main/res/layout/scene_gallery_previews.xml b/app/src/main/res/layout/scene_gallery_previews.xml
index d8a09920a..3285305a5 100644
--- a/app/src/main/res/layout/scene_gallery_previews.xml
+++ b/app/src/main/res/layout/scene_gallery_previews.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<com.hippo.widget.ContentLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.widget.ContentLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/content_layout"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"/>
+    android:layout_height="match_parent" />
diff --git a/app/src/main/res/layout/scene_history.xml b/app/src/main/res/layout/scene_history.xml
index 2c744732a..a26874972 100644
--- a/app/src/main/res/layout/scene_history.xml
+++ b/app/src/main/res/layout/scene_history.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -28,7 +26,7 @@
         <com.hippo.easyrecyclerview.EasyRecyclerView
             android:id="@+id/recycler_view"
             android:layout_width="match_parent"
-            android:layout_height="match_parent"/>
+            android:layout_height="match_parent" />
 
         <com.hippo.easyrecyclerview.FastScroller
             android:id="@+id/fast_scroller"
@@ -36,20 +34,20 @@
             android:layout_height="match_parent"
             android:layout_gravity="right"
             android:paddingLeft="20dp"
-            android:paddingRight="4dp"
             android:paddingTop="8dp"
-            android:paddingBottom="8dp"/>
+            android:paddingRight="4dp"
+            android:paddingBottom="8dp" />
 
     </FrameLayout>
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="16dp"
-        android:text="@string/no_history"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal"
+        android:text="@string/no_history" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/scene_label_list.xml b/app/src/main/res/layout/scene_label_list.xml
index 11f2c4607..1450f6537 100644
--- a/app/src/main/res/layout/scene_label_list.xml
+++ b/app/src/main/res/layout/scene_label_list.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -24,17 +22,17 @@
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:padding="@dimen/keyline_margin"
         android:clipChildren="false"
-        android:clipToPadding="false"/>
+        android:clipToPadding="false"
+        android:padding="@dimen/keyline_margin" />
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="16dp"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/scene_login.xml b/app/src/main/res/layout/scene_login.xml
index 0343a1f44..9b2732db0 100644
--- a/app/src/main/res/layout/scene_login.xml
+++ b/app/src/main/res/layout/scene_login.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,12 +14,11 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
 
     <ScrollView
         android:id="@+id/login_form"
@@ -39,16 +37,16 @@
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_horizontal"
                 android:padding="@dimen/keyline_margin"
-                android:src="@mipmap/ic_launcher"/>
+                android:src="@mipmap/ic_launcher" />
 
             <com.google.android.material.textfield.TextInputLayout
                 android:id="@+id/username_layout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_horizontal"
-                android:minWidth="@dimen/single_max_width"
-                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
-                android:hint="@string/username">
+                android:hint="@string/username"
+                android:minWidth="@dimen/single_max_width">
 
                 <com.hippo.widget.HackyTextInputEditText
                     android:id="@+id/username"
@@ -57,18 +55,18 @@
                     android:imeOptions="actionNext"
                     android:inputType="text"
                     android:maxLines="1"
-                    android:singleLine="true"/>
+                    android:singleLine="true" />
 
             </com.google.android.material.textfield.TextInputLayout>
 
             <com.google.android.material.textfield.TextInputLayout
                 android:id="@+id/password_layout"
+                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_horizontal"
-                android:minWidth="@dimen/single_max_width"
                 android:hint="@string/password"
-                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
+                android:minWidth="@dimen/single_max_width"
                 app:passwordToggleEnabled="true">
 
                 <com.hippo.widget.HackyTextInputEditText
@@ -78,26 +76,26 @@
                     android:imeOptions="actionDone"
                     android:inputType="textPassword"
                     android:maxLines="1"
-                    android:singleLine="true"/>
+                    android:singleLine="true" />
 
             </com.google.android.material.textfield.TextInputLayout>
 
             <Space
                 android:layout_width="wrap_content"
                 android:layout_height="0dp"
-                android:layout_weight="1"/>
+                android:layout_weight="1" />
 
             <LinearLayout
                 android:id="@+id/buttonPanel"
+                style="?attr/buttonBarStyle"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
+                android:gravity="bottom"
                 android:orientation="vertical"
                 android:paddingLeft="12dp"
-                android:paddingRight="12dp"
                 android:paddingTop="4dp"
-                android:paddingBottom="4dp"
-                android:gravity="bottom"
-                style="?attr/buttonBarStyle">
+                android:paddingRight="12dp"
+                android:paddingBottom="4dp">
 
                 <Button
                     android:id="@+id/sign_in"
@@ -105,8 +103,8 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
-                    android:textStyle="bold"
-                    android:text="@string/sign_in"/>
+                    android:text="@string/sign_in"
+                    android:textStyle="bold" />
 
                 <Button
                     android:id="@+id/register"
@@ -114,8 +112,8 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
-                    android:textStyle="bold"
-                    android:text="@string/register"/>
+                    android:text="@string/register"
+                    android:textStyle="bold" />
             </LinearLayout>
 
             <TextView
@@ -125,7 +123,7 @@
                 android:layout_gravity="center_horizontal"
                 android:layout_marginBottom="8dp"
                 android:text="@string/sign_in_via_webview"
-                android:textColor="?attr/textColorThemeAccent"/>
+                android:textColor="?attr/textColorThemeAccent" />
 
             <TextView
                 android:id="@+id/sign_in_via_cookies"
@@ -134,7 +132,7 @@
                 android:layout_gravity="center_horizontal"
                 android:layout_marginBottom="8dp"
                 android:text="@string/sign_in_via_cookies"
-                android:textColor="?attr/textColorThemeAccent"/>
+                android:textColor="?attr/textColorThemeAccent" />
 
             <TextView
                 android:id="@+id/skip_signing_in"
@@ -142,7 +140,7 @@
                 android:layout_height="wrap_content"
                 android:layout_gravity="center_horizontal"
                 android:text="@string/skip_signing_in"
-                android:textColor="?attr/textColorThemeAccent"/>
+                android:textColor="?attr/textColorThemeAccent" />
 
         </LinearLayout>
     </ScrollView>
@@ -159,7 +157,7 @@
             style="@style/ProgressView"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="center"/>
+            android:layout_gravity="center" />
 
     </FrameLayout>
 
diff --git a/app/src/main/res/layout/scene_progress.xml b/app/src/main/res/layout/scene_progress.xml
index ea7c6dbfd..ced7a8ce1 100644
--- a/app/src/main/res/layout/scene_progress.xml
+++ b/app/src/main/res/layout/scene_progress.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -25,16 +23,16 @@
         style="@style/ProgressView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center"/>
+        android:layout_gravity="center" />
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="8dp"
-        android:text="@string/no_one_comments_gallery"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal"
+        android:text="@string/no_one_comments_gallery" />
 
 </FrameLayout>
diff --git a/app/src/main/res/layout/scene_security.xml b/app/src/main/res/layout/scene_security.xml
index f18817944..980ba2dea 100755
--- a/app/src/main/res/layout/scene_security.xml
+++ b/app/src/main/res/layout/scene_security.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,19 +14,17 @@
   ~ limitations under the License.
   -->
 
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <com.hippo.widget.MaxSizeContainer
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.MaxSizeContainer xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
         android:layout_margin="32dp"
-        app:maxWidth="320dp"
-        app:maxHeight="360dp">
+        app:maxHeight="360dp"
+        app:maxWidth="320dp">
 
         <LinearLayout
             android:layout_width="wrap_content"
@@ -37,14 +34,14 @@
             <com.hippo.widget.lockpattern.LockPatternView
                 android:id="@+id/pattern_view"
                 android:layout_width="wrap_content"
-                android:layout_height="wrap_content"/>
+                android:layout_height="wrap_content" />
 
             <ImageView
                 android:id="@+id/fingerprint_icon"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:src="@drawable/ic_fp_40px"
                 android:layout_gravity="center_horizontal"
+                android:src="@drawable/ic_fp_40px"
                 android:visibility="gone" />
 
         </LinearLayout>
diff --git a/app/src/main/res/layout/scene_select_site.xml b/app/src/main/res/layout/scene_select_site.xml
index b89205a04..c617fdd8a 100644
--- a/app/src/main/res/layout/scene_select_site.xml
+++ b/app/src/main/res/layout/scene_select_site.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,19 +14,17 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="@dimen/keyline_margin"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:padding="@dimen/keyline_margin">
 
-    <com.hippo.widget.MaxSizeContainer
-        xmlns:app="http://schemas.android.com/apk/res-auto"
+    <com.hippo.widget.MaxSizeContainer xmlns:app="http://schemas.android.com/apk/res-auto"
         android:layout_width="wrap_content"
         android:layout_height="0dp"
-        android:layout_weight="1"
         android:layout_gravity="center_horizontal"
+        android:layout_weight="1"
         app:maxWidth="@dimen/single_max_width">
 
         <ScrollView
@@ -44,13 +41,13 @@
                 <TextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:textAppearance="@style/TextAppearance.AppCompat.Title"
-                    android:text="@string/select_scene"/>
+                    android:text="@string/select_scene"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Title" />
 
                 <Space
                     android:layout_width="0dp"
                     android:layout_height="0dp"
-                    android:layout_weight="1"/>
+                    android:layout_weight="1" />
 
                 <RadioGroup
                     android:id="@+id/radio_group"
@@ -65,28 +62,28 @@
                         android:layout_height="wrap_content"
                         android:layout_marginBottom="@dimen/keyline_margin"
                         android:gravity="center_vertical"
-                        android:textSize="@dimen/text_medium"
-                        android:text="@string/site_e"/>
+                        android:text="@string/site_e"
+                        android:textSize="@dimen/text_medium" />
 
                     <RadioButton
                         android:id="@+id/site_ex"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:gravity="center_vertical"
-                        android:textSize="@dimen/text_medium"
-                        android:text="@string/site_ex"/>
+                        android:text="@string/site_ex"
+                        android:textSize="@dimen/text_medium" />
 
                 </RadioGroup>
 
                 <TextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:text="@string/select_scene_explain"/>
+                    android:text="@string/select_scene_explain" />
 
                 <Space
                     android:layout_width="0dp"
                     android:layout_height="0dp"
-                    android:layout_weight="1"/>
+                    android:layout_weight="1" />
 
             </LinearLayout>
         </ScrollView>
@@ -94,23 +91,24 @@
 
     <LinearLayout
         android:id="@+id/buttonPanel"
+        style="?attr/buttonBarStyle"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:gravity="bottom"
         android:orientation="horizontal"
         android:paddingLeft="12dp"
-        android:paddingRight="12dp"
         android:paddingTop="4dp"
-        android:paddingBottom="4dp"
-        android:gravity="bottom"
-        style="?attr/buttonBarStyle">
+        android:paddingRight="12dp"
+        android:paddingBottom="4dp">
+
         <Button
             android:id="@+id/ok"
             style="@style/Widget.MaterialComponents.Button"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:textStyle="bold"
-            android:text="@android:string/ok"/>
+            android:text="@android:string/ok"
+            android:textStyle="bold" />
 
     </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/scene_warning.xml b/app/src/main/res/layout/scene_warning.xml
index eea0f9ecb..37d454505 100644
--- a/app/src/main/res/layout/scene_warning.xml
+++ b/app/src/main/res/layout/scene_warning.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,42 +14,41 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:padding="@dimen/keyline_margin"
-    android:orientation="vertical">
+    android:orientation="vertical"
+    android:padding="@dimen/keyline_margin">
 
     <ImageView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
         android:padding="@dimen/keyline_margin"
-        app:srcCompat="@drawable/v_alert_red_x48"/>
+        app:srcCompat="@drawable/v_alert_red_x48" />
 
     <com.hippo.widget.MaxSizeContainer
         android:layout_width="wrap_content"
         android:layout_height="0dp"
-        android:layout_weight="1"
         android:layout_gravity="center_horizontal"
+        android:layout_weight="1"
         app:maxWidth="@dimen/single_max_width">
 
         <ScrollView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:clipToPadding="false"
             android:paddingTop="@dimen/keyline_margin"
-            android:paddingBottom="@dimen/keyline_margin"
-            android:clipToPadding="false">
+            android:paddingBottom="@dimen/keyline_margin">
 
             <TextView
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:lineSpacingExtra="8dp"
                 android:text="@string/app_waring"
                 android:textColor="?android:attr/textColorPrimary"
-                android:textSize="@dimen/text_little_small"
-                android:lineSpacingExtra="8dp"/>
+                android:textSize="@dimen/text_little_small" />
 
         </ScrollView>
 
@@ -58,15 +56,15 @@
 
     <LinearLayout
         android:id="@+id/buttonPanel"
+        style="?attr/buttonBarStyle"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:gravity="bottom"
         android:orientation="vertical"
         android:paddingLeft="12dp"
-        android:paddingRight="12dp"
         android:paddingTop="4dp"
-        android:paddingBottom="4dp"
-        android:gravity="bottom"
-        style="?attr/buttonBarStyle">
+        android:paddingRight="12dp"
+        android:paddingBottom="4dp">
 
         <Button
             android:id="@+id/accept"
@@ -74,8 +72,8 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:textStyle="bold"
-            android:text="@string/accept"/>
+            android:text="@string/accept"
+            android:textStyle="bold" />
 
         <Button
             android:id="@+id/reject"
@@ -83,8 +81,8 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:textStyle="bold"
-            android:text="@string/reject"/>
+            android:text="@string/reject"
+            android:textStyle="bold" />
 
     </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/search_action.xml b/app/src/main/res/layout/search_action.xml
index 87fc9ea34..2999cab96 100644
--- a/app/src/main/res/layout/search_action.xml
+++ b/app/src/main/res/layout/search_action.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,25 +13,24 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    style="?attr/buttonBarStyle"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="horizontal"
-    style="?attr/buttonBarStyle">
+    android:orientation="horizontal">
 
     <Button
         android:id="@+id/action"
+        style="@style/Widget.MaterialComponents.Button.TextButton"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:textColor="?attr/colorPrimary"
-        android:textStyle="bold"
-        style="@style/Widget.MaterialComponents.Button.TextButton"/>
+        android:textStyle="bold" />
 
     <Space
         android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:layout_weight="1"/>
+        android:layout_weight="1" />
 
 </LinearLayout>
diff --git a/app/src/main/res/layout/search_advance.xml b/app/src/main/res/layout/search_advance.xml
index cfe7a0a4c..1e58c7a0b 100644
--- a/app/src/main/res/layout/search_advance.xml
+++ b/app/src/main/res/layout/search_advance.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,8 +13,7 @@
   ~ limitations under the License.
   -->
 
-<com.hippo.ehviewer.widget.AdvanceSearchTable
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.ehviewer.widget.AdvanceSearchTable xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/search_advance_search_table"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"/>
+    android:layout_height="wrap_content" />
diff --git a/app/src/main/res/layout/search_category.xml b/app/src/main/res/layout/search_category.xml
index 633c0f78a..2cddc9d77 100644
--- a/app/src/main/res/layout/search_category.xml
+++ b/app/src/main/res/layout/search_category.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,12 +13,11 @@
   ~ limitations under the License.
   -->
 
-<com.google.android.material.card.MaterialCardView
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/CardView.Normal"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="2dp"
-    style="@style/CardView.Normal">
+    android:layout_margin="2dp">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -34,12 +32,12 @@
             style="@style/CategoryTitle"
             android:layout_width="match_parent"
             android:layout_height="@dimen/search_category_title_height"
-            android:saveEnabled="false"/>
+            android:saveEnabled="false" />
 
         <FrameLayout
             android:id="@+id/category_content"
             android:layout_width="match_parent"
-            android:layout_height="wrap_content"/>
+            android:layout_height="wrap_content" />
 
     </LinearLayout>
 </com.google.android.material.card.MaterialCardView>
diff --git a/app/src/main/res/layout/search_image.xml b/app/src/main/res/layout/search_image.xml
index acb01206b..8399570e7 100644
--- a/app/src/main/res/layout/search_image.xml
+++ b/app/src/main/res/layout/search_image.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,8 +14,7 @@
   ~ limitations under the License.
   -->
 
-<com.hippo.ehviewer.widget.ImageSearchLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<com.hippo.ehviewer.widget.ImageSearchLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/search_image"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"/>
+    android:layout_height="wrap_content" />
diff --git a/app/src/main/res/layout/search_normal.xml b/app/src/main/res/layout/search_normal.xml
index 43fd8eb82..6517166fd 100644
--- a/app/src/main/res/layout/search_normal.xml
+++ b/app/src/main/res/layout/search_normal.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,8 +13,7 @@
   ~ limitations under the License.
   -->
 
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -25,40 +23,40 @@
         android:id="@+id/search_category_table"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginBottom="@dimen/search_item_interval"/>
+        android:layout_marginBottom="@dimen/search_item_interval" />
 
     <com.hippo.widget.RadioGridGroup
         android:id="@+id/normal_search_mode"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
+        android:checkedButton="@+id/search_normal_search"
         android:orientation="vertical"
         android:paddingTop="@dimen/search_item_interval"
-        android:checkedButton="@+id/search_normal_search"
         app:columnCount="2">
 
         <androidx.appcompat.widget.AppCompatRadioButton
             android:id="@+id/search_normal_search"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="@string/search_normal_search"/>
+            android:text="@string/search_normal_search" />
 
         <androidx.appcompat.widget.AppCompatRadioButton
             android:id="@+id/search_subscription_search"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="@string/search_subscription_search"/>
+            android:text="@string/search_subscription_search" />
 
         <androidx.appcompat.widget.AppCompatRadioButton
             android:id="@+id/search_specify_uploader"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="@string/search_specify_uploader"/>
+            android:text="@string/search_specify_uploader" />
 
         <androidx.appcompat.widget.AppCompatRadioButton
             android:id="@+id/search_specify_tag"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="@string/search_specify_tag"/>
+            android:text="@string/search_specify_tag" />
 
     </com.hippo.widget.RadioGridGroup>
 
@@ -71,21 +69,21 @@
             android:id="@+id/normal_search_mode_help"
             android:layout_width="36dp"
             android:layout_height="36dp"
-            android:padding="6dp"
             android:background="?selectableItemBackgroundBorderless"
-            app:srcCompat="@drawable/v_help_circle_x24"/>
+            android:padding="6dp"
+            app:srcCompat="@drawable/v_help_circle_x24" />
 
         <Space
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"/>
+            android:layout_weight="1" />
 
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/search_enable_advance"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="bottom"
-            android:text="@string/search_enable_advance"/>
+            android:text="@string/search_enable_advance" />
 
     </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/layout/widget_advance_search_table.xml b/app/src/main/res/layout/widget_advance_search_table.xml
index 4c25662ad..da26d2f88 100644
--- a/app/src/main/res/layout/widget_advance_search_table.xml
+++ b/app/src/main/res/layout/widget_advance_search_table.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -13,8 +12,7 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<merge
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -24,20 +22,20 @@
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginRight="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
+            android:layout_marginRight="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
             android:checked="true"
-            android:text="@string/search_sname"/>
+            android:text="@string/search_sname" />
 
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
+            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
             android:checked="true"
-            android:text="@string/search_stags"/>
+            android:text="@string/search_stags" />
     </LinearLayout>
 
     <LinearLayout
@@ -49,18 +47,18 @@
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginRight="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:text="@string/search_sdesc"/>
+            android:layout_marginRight="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
+            android:text="@string/search_sdesc" />
 
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
+            android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/advance_search_table_item_margin"
-            android:layout_gravity="center_vertical"
-            android:text="@string/search_storr"/>
+            android:layout_weight="1"
+            android:text="@string/search_storr" />
     </LinearLayout>
 
     <LinearLayout
@@ -72,18 +70,18 @@
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginRight="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:text="@string/search_sto"/>
+            android:layout_marginRight="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
+            android:text="@string/search_sto" />
 
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
+            android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/advance_search_table_item_margin"
-            android:layout_gravity="center_vertical"
-            android:text="@string/search_sdt1"/>
+            android:layout_weight="1"
+            android:text="@string/search_sdt1" />
     </LinearLayout>
 
     <LinearLayout
@@ -95,18 +93,18 @@
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginRight="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:text="@string/search_sdt2"/>
+            android:layout_marginRight="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
+            android:text="@string/search_sdt2" />
 
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
+            android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/advance_search_table_item_margin"
-            android:layout_gravity="center_vertical"
-            android:text="@string/search_sh"/>
+            android:layout_weight="1"
+            android:text="@string/search_sh" />
     </LinearLayout>
 
     <LinearLayout
@@ -118,18 +116,18 @@
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginRight="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:text="@string/search_sr"/>
+            android:layout_marginRight="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
+            android:text="@string/search_sr" />
 
         <Spinner
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:entries="@array/search_min_rating"/>
+            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
+            android:entries="@array/search_min_rating" />
     </LinearLayout>
 
     <LinearLayout
@@ -141,48 +139,48 @@
         <CheckBox
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginRight="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:text="@string/search_sp"/>
+            android:layout_marginRight="@dimen/advance_search_table_item_margin"
+            android:text="@string/search_sp" />
 
         <EditText
             android:id="@+id/spf"
             android:layout_width="64dp"
             android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_marginRight="@dimen/advance_search_table_item_margin"
-            android:layout_gravity="center_vertical"
+            android:imeOptions="actionNext"
             android:inputType="number"
-            android:maxLines="1"
-            android:imeOptions="actionNext"/>
+            android:maxLines="1" />
 
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_marginRight="@dimen/advance_search_table_item_margin"
-            android:layout_gravity="center_vertical"
             android:text="@string/search_sp_to"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
 
         <EditText
             android:id="@+id/spt"
             android:layout_width="64dp"
             android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_marginRight="@dimen/advance_search_table_item_margin"
-            android:layout_gravity="center_vertical"
+            android:imeOptions="actionNone"
             android:inputType="number"
-            android:maxLines="1"
-            android:imeOptions="actionNone"/>
+            android:maxLines="1" />
 
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
+            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:text="@string/search_sp_suffix"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
     </LinearLayout>
 
     <LinearLayout
@@ -196,7 +194,7 @@
             android:layout_height="wrap_content"
             android:layout_gravity="center_vertical"
             android:text="@string/search_sf"
-            android:textColor="?android:attr/textColorPrimary"/>
+            android:textColor="?android:attr/textColorPrimary" />
     </LinearLayout>
 
     <LinearLayout
@@ -207,26 +205,26 @@
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginRight="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:text="@string/search_sfl"/>
+            android:layout_marginRight="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
+            android:text="@string/search_sfl" />
 
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
+            android:layout_gravity="center_vertical"
             android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_marginRight="@dimen/advance_search_table_item_margin"
-            android:layout_gravity="center_vertical"
-            android:text="@string/search_sfu"/>
+            android:layout_weight="1"
+            android:text="@string/search_sfu" />
 
         <CheckBox
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
             android:layout_gravity="center_vertical"
-            android:text="@string/search_sft"/>
+            android:layout_marginLeft="@dimen/advance_search_table_item_margin"
+            android:layout_weight="1"
+            android:text="@string/search_sft" />
     </LinearLayout>
 </merge>
diff --git a/app/src/main/res/layout/widget_category_table.xml b/app/src/main/res/layout/widget_category_table.xml
index 5f3fc0c3f..8780ea314 100644
--- a/app/src/main/res/layout/widget_category_table.xml
+++ b/app/src/main/res/layout/widget_category_table.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,133 +13,137 @@
   ~ limitations under the License.
   -->
 
-<merge
-    xmlns:android="http://schemas.android.com/apk/res/android" >
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <TableRow>
+
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginBottom="@dimen/category_table_item_margin"
             android:layout_marginRight="@dimen/category_table_item_margin"
+            android:layout_marginBottom="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/doujinshi"
-            android:textColor="@android:color/white"
-            android:text="@string/doujinshi" />
+            android:text="@string/doujinshi"
+            android:textColor="@android:color/white" />
 
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginBottom="@dimen/category_table_item_margin"
             android:layout_marginLeft="@dimen/category_table_item_margin"
+            android:layout_marginBottom="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/manga"
-            android:textColor="@android:color/white"
-            android:text="@string/manga" />
+            android:text="@string/manga"
+            android:textColor="@android:color/white" />
     </TableRow>
 
     <TableRow>
+
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
             android:layout_marginTop="@dimen/category_table_item_margin"
-            android:layout_marginBottom="@dimen/category_table_item_margin"
             android:layout_marginRight="@dimen/category_table_item_margin"
+            android:layout_marginBottom="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/artist_cg"
-            android:textColor="@android:color/white"
-            android:text="@string/artist_cg" />
+            android:text="@string/artist_cg"
+            android:textColor="@android:color/white" />
 
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
+            android:layout_marginLeft="@dimen/category_table_item_margin"
             android:layout_marginTop="@dimen/category_table_item_margin"
             android:layout_marginBottom="@dimen/category_table_item_margin"
-            android:layout_marginLeft="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/game_cg"
-            android:textColor="@android:color/white"
-            android:text="@string/game_cg" />
+            android:text="@string/game_cg"
+            android:textColor="@android:color/white" />
     </TableRow>
 
     <TableRow>
+
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
             android:layout_marginTop="@dimen/category_table_item_margin"
-            android:layout_marginBottom="@dimen/category_table_item_margin"
             android:layout_marginRight="@dimen/category_table_item_margin"
+            android:layout_marginBottom="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/western"
-            android:textColor="@android:color/white"
-            android:text="@string/western" />
+            android:text="@string/western"
+            android:textColor="@android:color/white" />
 
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
+            android:layout_marginLeft="@dimen/category_table_item_margin"
             android:layout_marginTop="@dimen/category_table_item_margin"
             android:layout_marginBottom="@dimen/category_table_item_margin"
-            android:layout_marginLeft="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/non_h"
-            android:textColor="@android:color/white"
-            android:text="@string/non_h" />
+            android:text="@string/non_h"
+            android:textColor="@android:color/white" />
     </TableRow>
 
     <TableRow>
+
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
             android:layout_marginTop="@dimen/category_table_item_margin"
-            android:layout_marginBottom="@dimen/category_table_item_margin"
             android:layout_marginRight="@dimen/category_table_item_margin"
+            android:layout_marginBottom="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/image_set"
-            android:textColor="@android:color/white"
-            android:text="@string/image_set" />
+            android:text="@string/image_set"
+            android:textColor="@android:color/white" />
 
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
+            android:layout_marginLeft="@dimen/category_table_item_margin"
             android:layout_marginTop="@dimen/category_table_item_margin"
             android:layout_marginBottom="@dimen/category_table_item_margin"
-            android:layout_marginLeft="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/cosplay"
-            android:textColor="@android:color/white"
-            android:text="@string/cosplay" />
+            android:text="@string/cosplay"
+            android:textColor="@android:color/white" />
     </TableRow>
 
     <TableRow>
-        <com.hippo.widget.CheckTextView
-            style="@style/CategoryText"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_marginTop="@dimen/category_table_item_margin"
-            android:layout_marginRight="@dimen/category_table_item_margin"
-            android:background="@color/asian_porn"
-            android:textColor="@android:color/white"
-            android:text="@string/asian_porn" />
 
         <com.hippo.widget.CheckTextView
             style="@style/CategoryText"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
             android:layout_marginTop="@dimen/category_table_item_margin"
+            android:layout_marginRight="@dimen/category_table_item_margin"
+            android:layout_weight="1"
+            android:background="@color/asian_porn"
+            android:text="@string/asian_porn"
+            android:textColor="@android:color/white" />
+
+        <com.hippo.widget.CheckTextView
+            style="@style/CategoryText"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
             android:layout_marginLeft="@dimen/category_table_item_margin"
+            android:layout_marginTop="@dimen/category_table_item_margin"
+            android:layout_weight="1"
             android:background="@color/misc"
-            android:textColor="@android:color/white"
-            android:text="@string/misc" />
+            android:text="@string/misc"
+            android:textColor="@android:color/white" />
     </TableRow>
 
 </merge>
diff --git a/app/src/main/res/layout/widget_content_layout.xml b/app/src/main/res/layout/widget_content_layout.xml
index a8c97a2c6..ac55c3bbf 100644
--- a/app/src/main/res/layout/widget_content_layout.xml
+++ b/app/src/main/res/layout/widget_content_layout.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,24 +14,23 @@
   ~ limitations under the License.
   -->
 
-<merge
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <com.hippo.widget.ProgressView
         android:id="@+id/progress"
         style="@style/ProgressView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_gravity="center"/>
+        android:layout_gravity="center" />
 
     <TextView
         android:id="@+id/tip"
+        style="@style/TextAppearance.AppCompat.Medium"
         android:layout_width="228dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center"
-        android:gravity="center_horizontal"
         android:drawablePadding="8dp"
-        style="@style/TextAppearance.AppCompat.Medium"/>
+        android:gravity="center_horizontal" />
 
     <FrameLayout
         android:id="@+id/content_view"
@@ -48,7 +46,7 @@
                 android:id="@+id/recycler_view"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
-                android:clipToPadding="false"/>
+                android:clipToPadding="false" />
 
         </com.hippo.refreshlayout.RefreshLayout>
 
@@ -58,9 +56,9 @@
             android:layout_height="match_parent"
             android:layout_gravity="right"
             android:paddingLeft="20dp"
-            android:paddingRight="4dp"
             android:paddingTop="8dp"
-            android:paddingBottom="8dp"/>
+            android:paddingRight="4dp"
+            android:paddingBottom="8dp" />
 
     </FrameLayout>
 
diff --git a/app/src/main/res/layout/widget_gallery_guide_1.xml b/app/src/main/res/layout/widget_gallery_guide_1.xml
index 0fe2659bf..2c1cf1879 100644
--- a/app/src/main/res/layout/widget_gallery_guide_1.xml
+++ b/app/src/main/res/layout/widget_gallery_guide_1.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,35 +14,34 @@
   ~ limitations under the License.
   -->
 
-<merge
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <TextView
+        style="@style/Guide.Title"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/guide_gallery_left"
         android:gravity="center"
-        style="@style/Guide.Title"/>
+        android:text="@string/guide_gallery_left" />
 
     <TextView
+        style="@style/Guide.Title"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/guide_gallery_right"
         android:gravity="center"
-        style="@style/Guide.Title"/>
+        android:text="@string/guide_gallery_right" />
 
     <TextView
+        style="@style/Guide.Title"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/guide_gallery_menu"
         android:gravity="center"
-        style="@style/Guide.Title"/>
+        android:text="@string/guide_gallery_menu" />
 
     <TextView
+        style="@style/Guide.Title"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/guide_gallery_progress"
         android:gravity="center"
-        style="@style/Guide.Title"/>
+        android:text="@string/guide_gallery_progress" />
 
 </merge>
diff --git a/app/src/main/res/layout/widget_gallery_guide_2.xml b/app/src/main/res/layout/widget_gallery_guide_2.xml
index 684b73943..8a0cebc2a 100644
--- a/app/src/main/res/layout/widget_gallery_guide_2.xml
+++ b/app/src/main/res/layout/widget_gallery_guide_2.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,14 +14,13 @@
   ~ limitations under the License.
   -->
 
-<merge
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <TextView
+        style="@style/Guide.Title"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:gravity="center"
-        android:text="@string/guide_gallery_long_click"
-        style="@style/Guide.Title"/>
+        android:text="@string/guide_gallery_long_click" />
 
 </merge>
diff --git a/app/src/main/res/layout/widget_image_search.xml b/app/src/main/res/layout/widget_image_search.xml
index 992fb12db..bb2e42353 100644
--- a/app/src/main/res/layout/widget_image_search.xml
+++ b/app/src/main/res/layout/widget_image_search.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright 2016 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,71 +14,72 @@
   ~ limitations under the License.
   -->
 
-<merge
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <com.hippo.widget.FixedAspectImageView
         android:id="@+id/preview"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
+        android:adjustViewBounds="true"
         android:maxWidth="@dimen/image_search_max_size"
         android:maxHeight="@dimen/image_search_max_size"
-        android:adjustViewBounds="true"
-        android:visibility="gone"/>
+        android:visibility="gone" />
 
     <Button
         android:id="@+id/select_image"
+        style="@style/Widget.MaterialComponents.Button"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal"
-        android:text="@string/select_image"
-        style="@style/Widget.MaterialComponents.Button"/>
+        android:text="@string/select_image" />
 
     <TableLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
 
         <TableRow>
+
             <CheckBox
                 android:id="@+id/search_uss"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
-                android:layout_marginBottom="@dimen/advance_search_table_item_margin"
                 android:layout_marginRight="@dimen/advance_search_table_item_margin"
+                android:layout_marginBottom="@dimen/advance_search_table_item_margin"
+                android:layout_weight="1"
                 android:checked="true"
-                android:text="@string/search_uss"/>
+                android:text="@string/search_uss" />
 
             <CheckBox
                 android:id="@+id/search_osc"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
-                android:layout_marginBottom="@dimen/advance_search_table_item_margin"
                 android:layout_marginLeft="@dimen/advance_search_table_item_margin"
+                android:layout_marginBottom="@dimen/advance_search_table_item_margin"
+                android:layout_weight="1"
                 android:checked="false"
-                android:text="@string/search_osc"/>
+                android:text="@string/search_osc" />
         </TableRow>
 
         <TableRow>
+
             <CheckBox
                 android:id="@+id/search_se"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
                 android:layout_marginTop="@dimen/advance_search_table_item_margin"
                 android:layout_marginRight="@dimen/advance_search_table_item_margin"
+                android:layout_weight="1"
                 android:checked="false"
-                android:text="@string/search_se"/>
+                android:text="@string/search_se" />
 
             <Space
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
-                android:layout_weight="1"
-                android:layout_marginTop="@dimen/advance_search_table_item_margin"
                 android:layout_marginLeft="@dimen/advance_search_table_item_margin"
-                android:checked="false"/>
+                android:layout_marginTop="@dimen/advance_search_table_item_margin"
+                android:layout_weight="1"
+                android:checked="false" />
 
         </TableRow>
     </TableLayout>
diff --git a/app/src/main/res/layout/widget_search_bar.xml b/app/src/main/res/layout/widget_search_bar.xml
index afe05e879..5a4c84749 100644
--- a/app/src/main/res/layout/widget_search_bar.xml
+++ b/app/src/main/res/layout/widget_search_bar.xml
@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 Hippo Seven
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,8 +13,7 @@
   ~ limitations under the License.
   -->
 
-<merge
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -31,7 +29,7 @@
                 android:layout_width="48dp"
                 android:layout_height="48dp"
                 android:layout_gravity="left|center_vertical"
-                android:padding="12dp"/>
+                android:padding="12dp" />
 
             <TextView
                 android:id="@+id/search_title"
@@ -40,17 +38,17 @@
                 android:layout_gravity="center_vertical"
                 android:layout_marginLeft="48dp"
                 android:layout_marginRight="48dp"
-                android:textSize="@dimen/text_little_large"
-                android:textColor="?android:attr/textColorSecondary"
+                android:maxLines="1"
                 android:singleLine="true"
-                android:maxLines="1"/>
+                android:textColor="?android:attr/textColorSecondary"
+                android:textSize="@dimen/text_little_large" />
 
             <ImageView
                 android:id="@+id/search_action"
                 android:layout_width="48dp"
                 android:layout_height="48dp"
                 android:layout_gravity="right|center_vertical"
-                android:padding="12dp"/>
+                android:padding="12dp" />
 
             <com.hippo.ehviewer.widget.SearchEditText
                 android:id="@+id/search_edit_text"
@@ -59,13 +57,13 @@
                 android:layout_gravity="center_vertical"
                 android:layout_marginLeft="48dp"
                 android:layout_marginRight="48dp"
-                android:textSize="@dimen/text_little_small"
                 android:background="@null"
-                android:singleLine="true"
-                android:maxLines="1"
-                android:visibility="gone"
                 android:imeOptions="actionSearch"
-                android:inputType="text"/>
+                android:inputType="text"
+                android:maxLines="1"
+                android:singleLine="true"
+                android:textSize="@dimen/text_little_small"
+                android:visibility="gone" />
 
         </FrameLayout>
 
@@ -80,14 +78,14 @@
                 android:id="@+id/list_header"
                 android:layout_width="match_parent"
                 android:layout_height="1dp"
-                android:background="?attr/dividerColor"/>
+                android:background="?attr/dividerColor" />
 
             <ListView
                 android:id="@+id/search_bar_list"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:divider="?attr/dividerColor"
-                android:dividerHeight="1dp"/>
+                android:dividerHeight="1dp" />
 
         </LinearLayout>
     </LinearLayout>