Filter settings refactored

app/src/main/AndroidManifest.xml

@@ -23,7 +23,8 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission
         android:name="android.permission.WRITE_EXTERNAL_STORAGE"
-        android:maxSdkVersion="28" />
+        android:maxSdkVersion="28"
+        tools:ignore="ScopedStorage" />
 
     <uses-feature
         android:glEsVersion="0x00020000"
@@ -146,11 +147,6 @@
             android:label="@string/settings"
             android:theme="@style/AppTheme.Toolbar" />
 
-        <activity
-            android:name="com.hippo.ehviewer.ui.FilterActivity"
-            android:configChanges="screenSize|uiMode"
-            android:label="@string/filter"
-            android:theme="@style/AppTheme.Toolbar" />
         <activity
             android:name="com.hippo.ehviewer.ui.UConfigActivity"
             android:configChanges="screenSize|uiMode"

app/src/main/java/com/hippo/ehviewer/ui/fragment/FilterFragment.java

@@ -1,27 +1,12 @@
-/*
- * Copyright 2016 Hippo Seven
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.hippo.ehviewer.ui;
+package com.hippo.ehviewer.ui.fragment;
 
 import android.content.DialogInterface;
-import android.graphics.Paint;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.text.TextUtils;
+import android.view.LayoutInflater;
 import android.view.Menu;
+import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
@@ -30,27 +15,34 @@ import android.widget.ImageView;
 import android.widget.Spinner;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
 import androidx.appcompat.app.AlertDialog;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.DefaultItemAnimator;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.google.android.material.checkbox.MaterialCheckBox;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.textfield.TextInputLayout;
+import com.hippo.android.resource.AttrResources;
 import com.hippo.easyrecyclerview.EasyRecyclerView;
+import com.hippo.easyrecyclerview.LinearDividerItemDecoration;
 import com.hippo.ehviewer.R;
 import com.hippo.ehviewer.client.EhFilter;
 import com.hippo.ehviewer.dao.Filter;
 import com.hippo.util.DrawableManager;
 import com.hippo.view.ViewTransition;
+import com.hippo.yorozuya.LayoutUtils;
 import com.hippo.yorozuya.ViewUtils;
 
 import java.util.List;
 
-public class FilterActivity extends ToolbarActivity {
+public class FilterFragment extends Fragment {
 
-    @Nullable
-    private EasyRecyclerView mRecyclerView;
     @Nullable
     private ViewTransition mViewTransition;
     @Nullable
@@ -59,30 +51,59 @@ public class FilterActivity extends ToolbarActivity {
     private FilterList mFilterList;
 
     @Override
-    protected void onCreate(@Nullable Bundle savedInstanceState) {
+    public void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_filter);
+        setHasOptionsMenu(true);
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.activity_filter, container, false);
         setTitle(R.string.filter);
-        setNavigationIcon(R.drawable.v_arrow_left_dark_x24);
 
         mFilterList = new FilterList();
 
-        mRecyclerView = (EasyRecyclerView) ViewUtils.$$(this, R.id.recycler_view);
-        TextView tip = (TextView) ViewUtils.$$(this, R.id.tip);
-        mViewTransition = new ViewTransition(mRecyclerView, tip);
+        RecyclerView recyclerView = (EasyRecyclerView) ViewUtils.$$(view, R.id.recycler_view);
+        TextView tip = (TextView) ViewUtils.$$(view, R.id.tip);
+        mViewTransition = new ViewTransition(recyclerView, tip);
+        FloatingActionButton fab = view.findViewById(R.id.fab);
 
-        Drawable drawable = DrawableManager.getVectorDrawable(this, R.drawable.big_filter);
+        Drawable drawable = DrawableManager.getVectorDrawable(requireActivity(), R.drawable.big_filter);
         drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
         tip.setCompoundDrawables(null, drawable, null, null);
 
         mAdapter = new FilterAdapter();
-        mRecyclerView.setAdapter(mAdapter);
-        mRecyclerView.setClipToPadding(false);
-        mRecyclerView.setClipChildren(false);
-        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
-        mRecyclerView.hasFixedSize();
-        mRecyclerView.setItemAnimator(null);
+        mAdapter.setHasStableIds(true);
+        recyclerView.setAdapter(mAdapter);
+        recyclerView.setClipToPadding(false);
+        recyclerView.setClipChildren(false);
+        LinearDividerItemDecoration decoration = new LinearDividerItemDecoration(
+                LinearDividerItemDecoration.VERTICAL,
+                AttrResources.getAttrColor(requireActivity(), R.attr.dividerColor),
+                LayoutUtils.dp2pix(requireActivity(), 1));
+        decoration.setShowLastDivider(true);
+        recyclerView.addItemDecoration(decoration);
+        recyclerView.setLayoutManager(new LinearLayoutManager(requireContext()));
+        recyclerView.setHasFixedSize(true);
+        DefaultItemAnimator defaultItemAnimator = (DefaultItemAnimator) recyclerView.getItemAnimator();
+        if (defaultItemAnimator != null) {
+            defaultItemAnimator.setSupportsChangeAnimations(false);
+        }
+        recyclerView.setPadding(
+                recyclerView.getPaddingLeft(),
+                recyclerView.getPaddingTop(),
+                recyclerView.getPaddingRight(),
+                recyclerView.getPaddingBottom() + getResources().getDimensionPixelOffset(R.dimen.gallery_padding_bottom_fab));
 
+        fab.setOnClickListener(v -> showAddFilterDialog());
+
+        return view;
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
         updateView(false);
     }
 
@@ -99,48 +120,40 @@ public class FilterActivity extends ToolbarActivity {
     }
 
     @Override
-    protected void onDestroy() {
-        super.onDestroy();
+    public void onDestroyView() {
+        super.onDestroyView();
 
-        mRecyclerView = null;
         mViewTransition = null;
         mAdapter = null;
         mFilterList = null;
     }
 
     @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        super.onCreateOptionsMenu(menu);
-        getMenuInflater().inflate(R.menu.activity_filter, menu);
-        return true;
+    public void onCreateOptionsMenu(@NonNull Menu menu, @NonNull MenuInflater inflater) {
+        super.onCreateOptionsMenu(menu, inflater);
+        inflater.inflate(R.menu.activity_filter, menu);
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
-        switch (item.getItemId()) {
-            case android.R.id.home:
-                finish();
-                return true;
-            case R.id.action_add:
-                showAddFilterDialog();
-                return true;
-            case R.id.action_tip:
-                showTipDialog();
-                return true;
-            default:
-                return super.onOptionsItemSelected(item);
+        int itemId = item.getItemId();
+        if (itemId == R.id.action_tip) {
+            showTipDialog();
+            return true;
         }
+        return super.onOptionsItemSelected(item);
     }
 
     private void showTipDialog() {
-        new MaterialAlertDialogBuilder(this)
+        new MaterialAlertDialogBuilder(requireActivity())
                 .setTitle(R.string.filter)
                 .setMessage(R.string.filter_tip)
+                .setPositiveButton(android.R.string.ok, null)
                 .show();
     }
 
     private void showAddFilterDialog() {
-        AlertDialog dialog = new MaterialAlertDialogBuilder(this)
+        AlertDialog dialog = new MaterialAlertDialogBuilder(requireActivity())
                 .setTitle(R.string.add_filter)
                 .setView(R.layout.dialog_add_filter)
                 .setPositiveButton(R.string.add, null)
@@ -152,7 +165,7 @@ public class FilterActivity extends ToolbarActivity {
 
     private void showDeleteFilterDialog(final Filter filter) {
         String message = getString(R.string.delete_filter, filter.text);
-        new MaterialAlertDialogBuilder(this)
+        new MaterialAlertDialogBuilder(requireActivity())
                 .setMessage(message)
                 .setPositiveButton(R.string.delete, (dialog, which) -> {
                     if (DialogInterface.BUTTON_POSITIVE != which || null == mFilterList) {
@@ -224,41 +237,17 @@ public class FilterActivity extends ToolbarActivity {
         }
     }
 
-    private class FilterHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
+    private static class FilterHolder extends RecyclerView.ViewHolder {
 
+        private final MaterialCheckBox checkbox;
         private final TextView text;
-        private final ImageView icon;
+        private final ImageView delete;
 
         public FilterHolder(View itemView) {
             super(itemView);
-            text = (TextView) ViewUtils.$$(itemView, R.id.text);
-            icon = itemView.findViewById(R.id.icon);
-
-            if (null != icon) {
-                icon.setOnClickListener(this);
-            }
-            // click on the filter text to enable/disable it
-            text.setOnClickListener(this);
-        }
-
-        @Override
-        public void onClick(View v) {
-            int position = getAdapterPosition();
-            if (position < 0 || null == mFilterList) {
-                return;
-            }
-            Filter filter = mFilterList.get(position);
-            if (FilterList.MODE_HEADER != filter.mode) {
-                if (v instanceof ImageView) {
-                    showDeleteFilterDialog(filter);
-                } else if (v instanceof TextView) {
-                    mFilterList.trigger(filter);
-
-                    //for updating delete line on filter text
-                    mAdapter.notifyItemChanged(getAdapterPosition());
-                }
-
-            }
+            checkbox = itemView.findViewById(R.id.checkbox);
+            text = itemView.findViewById(R.id.text);
+            delete = itemView.findViewById(R.id.delete);
         }
     }
 
@@ -280,8 +269,9 @@ public class FilterActivity extends ToolbarActivity {
             }
         }
 
+        @NonNull
         @Override
-        public FilterHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        public FilterHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
             int layoutId;
             switch (viewType) {
                 default:
@@ -293,18 +283,11 @@ public class FilterActivity extends ToolbarActivity {
                     break;
             }
 
-            FilterHolder holder = new FilterHolder(getLayoutInflater().inflate(layoutId, parent, false));
-
-            if (R.layout.item_filter == layoutId) {
-                holder.icon.setImageDrawable(
-                        DrawableManager.getVectorDrawable(FilterActivity.this, R.drawable.v_delete_x24));
-            }
-
-            return holder;
+            return new FilterHolder(getLayoutInflater().inflate(layoutId, parent, false));
         }
 
         @Override
-        public void onBindViewHolder(FilterHolder holder, int position) {
+        public void onBindViewHolder(@NonNull FilterHolder holder, int position) {
             if (null == mFilterList) {
                 return;
             }
@@ -313,13 +296,17 @@ public class FilterActivity extends ToolbarActivity {
             if (FilterList.MODE_HEADER == filter.mode) {
                 holder.text.setText(filter.text);
             } else {
-                holder.text.setText(filter.text);
-                // add a delete line if the filter is disabled
-                if (!filter.enable) {
-                    holder.text.setPaintFlags(holder.text.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
-                } else {
-                    holder.text.setPaintFlags(holder.text.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG));
-                }
+                holder.checkbox.setText(filter.text);
+                holder.checkbox.setChecked(filter.enable);
+                holder.itemView.setOnClickListener(v -> {
+                    mFilterList.trigger(filter);
+
+                    //for updating delete line on filter text
+                    if (mAdapter != null) {
+                        mAdapter.notifyItemChanged(position);
+                    }
+                });
+                holder.delete.setOnClickListener(v -> showDeleteFilterDialog(filter));
             }
         }
 
@@ -327,6 +314,11 @@ public class FilterActivity extends ToolbarActivity {
         public int getItemCount() {
             return null != mFilterList ? mFilterList.size() : 0;
         }
+
+        @Override
+        public long getItemId(int position) {
+            return null != mFilterList ? mFilterList.get(position).text.hashCode() : 0;
+        }
     }
 
     private class FilterList {
@@ -441,8 +433,6 @@ public class FilterActivity extends ToolbarActivity {
                     return getTagNamespaceHeader();
                 } else if (index <= size) {
                     return mTagNamespaceFilterList.get(index - 1);
-                } else {
-                    index -= size + 1;
                 }
             }
 
@@ -461,4 +451,8 @@ public class FilterActivity extends ToolbarActivity {
             mEhFilter.triggerFilter(filter);
         }
     }
+
+    public void setTitle(@StringRes int string) {
+        requireActivity().setTitle(string);
+    }
 }

app/src/main/java/com/hippo/ehviewer/ui/fragment/HostsFragment.java

@@ -22,12 +22,13 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.textfield.TextInputLayout;
 import com.hippo.android.resource.AttrResources;
-import com.hippo.easyrecyclerview.EasyRecyclerView;
 import com.hippo.easyrecyclerview.LinearDividerItemDecoration;
 import com.hippo.ehviewer.EhApplication;
 import com.hippo.ehviewer.Hosts;
 import com.hippo.ehviewer.R;
+import com.hippo.view.ViewTransition;
 import com.hippo.yorozuya.LayoutUtils;
+import com.hippo.yorozuya.ViewUtils;
 
 import java.util.List;
 import java.util.Locale;
@@ -44,8 +45,7 @@ public class HostsFragment extends Fragment
     private Hosts hosts;
     private List<Pair<String, String>> data;
 
-    private EasyRecyclerView recyclerView;
-    private View tip;
+    private ViewTransition mViewTransition;
     private HostsAdapter adapter;
 
     @Override
@@ -61,8 +61,9 @@ public class HostsFragment extends Fragment
     public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.activity_hosts, container, false);
         setTitle(R.string.hosts);
-        recyclerView = view.findViewById(R.id.recycler_view);
-        tip = view.findViewById(R.id.tip);
+        RecyclerView recyclerView = view.findViewById(R.id.recycler_view);
+        TextView tip = (TextView) ViewUtils.$$(view, R.id.tip);
+        mViewTransition = new ViewTransition(recyclerView, tip);
         FloatingActionButton fab = view.findViewById(R.id.fab);
 
         adapter = new HostsAdapter();
@@ -83,12 +84,17 @@ public class HostsFragment extends Fragment
 
         fab.setOnClickListener(this);
 
-        recyclerView.setVisibility(data.isEmpty() ? View.GONE : View.VISIBLE);
-        tip.setVisibility(data.isEmpty() ? View.VISIBLE : View.GONE);
+        updateView(false);
 
         return view;
     }
 
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        updateView(false);
+    }
+
     public boolean onItemClick(int position) {
         Pair<String, String> pair = data.get(position);
         Bundle args = new Bundle();
@@ -107,10 +113,17 @@ public class HostsFragment extends Fragment
         new AddHostDialogFragment().show(getChildFragmentManager(), DIALOG_TAG_ADD_HOST);
     }
 
-    private void notifyHostsChanges() {
+    private void updateView(boolean animation) {
+        if (null == mViewTransition) {
+            return;
+        }
+
         data = hosts.getAll();
-        recyclerView.setVisibility(data.isEmpty() ? View.GONE : View.VISIBLE);
-        tip.setVisibility(data.isEmpty() ? View.VISIBLE : View.GONE);
+        if (data.isEmpty()) {
+            mViewTransition.showView(1, animation);
+        } else {
+            mViewTransition.showView(0, animation);
+        }
         adapter.notifyDataSetChanged();
     }
 
@@ -172,7 +185,7 @@ public class HostsFragment extends Fragment
             }
 
             hostsFragment.hosts.put(hostString, ipString);
-            hostsFragment.notifyHostsChanges();
+            hostsFragment.updateView(true);
 
             dialog.dismiss();
         }
@@ -185,7 +198,7 @@ public class HostsFragment extends Fragment
             String hostString = host.getText().toString().trim().toLowerCase(Locale.US);
 
             hostsFragment.hosts.delete(hostString);
-            hostsFragment.notifyHostsChanges();
+            hostsFragment.updateView(true);
 
             dialog.dismiss();
         }

app/src/main/res/layout/activity_filter.xml

@@ -21,8 +21,7 @@
     <com.hippo.easyrecyclerview.EasyRecyclerView
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:padding="@dimen/keyline_margin" />
+        android:layout_height="match_parent" />
 
     <TextView
         android:id="@+id/tip"
@@ -34,4 +33,22 @@
         android:gravity="center_horizontal"
         android:text="@string/no_filter" />
 
+    <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.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>

app/src/main/res/layout/item_download_label.xml

@@ -1,69 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-  ~ Copyright 2018 Hippo Seven
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~     http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
-
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:clipChildren="false">
-
-    <com.hippo.widget.ShadowLinearLayout
-        android:id="@+id/swipe_handler"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        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"
-                android:id="@+id/delete"
-                android:layout_width="48dp"
-                android:layout_height="48dp"
-                android:padding="12dp"
-                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:singleLine="true"
-                android:textColor="?android:attr/textColorPrimary"
-                android:textSize="@dimen/text_little_small" />
-
-            <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" />
-
-        </LinearLayout>
-
-        <View
-            android:layout_width="wrap_content"
-            android:layout_height="1dp"
-            android:background="?attr/dividerColor" />
-
-    </com.hippo.widget.ShadowLinearLayout>
-</FrameLayout>

app/src/main/res/layout/item_filter.xml

@@ -17,45 +17,32 @@
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:clipChildren="false">
+    android:background="?selectableItemBackground"
+    android:clickable="true"
+    android:focusable="true"
+    android:paddingHorizontal="@dimen/keyline_margin">
 
-    <com.hippo.widget.ShadowLinearLayout
+    <com.google.android.material.checkbox.MaterialCheckBox
+        android:id="@+id/checkbox"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:background="?attr/contentColorPrimary"
-        android:orientation="vertical">
+        android:background="@android:color/transparent"
+        android:clickable="false"
+        android:maxLines="1"
+        android:ellipsize="end"
+        android:focusable="false"
+        android:paddingStart="0dp"
+        android:paddingEnd="24dp" />
 
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:orientation="horizontal">
-
-            <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" />
-
-            <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:singleLine="true"
-                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" />
-
-    </com.hippo.widget.ShadowLinearLayout>
-</FrameLayout>
+    <ImageView xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:id="@+id/delete"
+        android:layout_width="32dp"
+        android:layout_height="32dp"
+        android:padding="4dp"
+        android:layout_gravity="end|center_vertical"
+        android:background="?selectableItemBackgroundBorderless"
+        android:clickable="true"
+        android:contentDescription="@string/delete"
+        android:focusable="true"
+        app:srcCompat="@drawable/v_delete_x24" />
+</FrameLayout>

app/src/main/res/layout/item_filter_header.xml

@@ -19,6 +19,6 @@
     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:paddingHorizontal="16dp"
+    android:paddingVertical="8dp"
+    android:textAppearance="@style/TextAppearance.MaterialComponents.Headline6" />

app/src/main/res/layout/item_quick_search.xml

@@ -1,69 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!--
-  ~ Copyright 2018 Hippo Seven
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~     http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
-
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:clipChildren="false">
-
-    <com.hippo.widget.ShadowLinearLayout
-        android:id="@+id/swipe_handler"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        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"
-                android:id="@+id/delete"
-                android:layout_width="48dp"
-                android:layout_height="48dp"
-                android:padding="12dp"
-                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:singleLine="true"
-                android:textColor="?android:attr/textColorPrimary"
-                android:textSize="@dimen/text_little_small" />
-
-            <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" />
-
-        </LinearLayout>
-
-        <View
-            android:layout_width="wrap_content"
-            android:layout_height="1dp"
-            android:background="?attr/dividerColor" />
-
-    </com.hippo.widget.ShadowLinearLayout>
-</FrameLayout>

app/src/main/res/menu/activity_filter.xml

@@ -17,12 +17,6 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
-    <item
-        android:id="@+id/action_add"
-        android:icon="@drawable/v_plus_dark_x24"
-        android:title="@string/add"
-        app:showAsAction="always" />
-
     <item
         android:id="@+id/action_tip"
         android:icon="@drawable/v_info_outline_dark_x24"

app/src/main/res/xml/eh_settings.xml

@@ -144,11 +144,11 @@
         app:iconSpaceReserved="false"
         app:url="@string/settings_eh_tag_translations_source_url" />
 
-    <com.hippo.preference.ActivityPreference
+    <Preference
         android:key="filter"
         android:summary="@string/settings_eh_filter_summary"
         android:title="@string/settings_eh_filter"
-        app:activity="com.hippo.ehviewer.ui.FilterActivity"
+        android:fragment="com.hippo.ehviewer.ui.fragment.FilterFragment"
         app:iconSpaceReserved="false" />
 
     <SwitchPreferenceCompat