diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 68bc9c08d..1aaf3e588 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -5,6 +5,7 @@
       <GradleProjectSettings>
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="1.7" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
@@ -14,5 +15,4 @@
       </GradleProjectSettings>
     </option>
   </component>
-</project>
-
+</project>
\ No newline at end of file
diff --git a/EhViewer.iml b/EhViewer.iml
index 8d4928417..2c937318b 100644
--- a/EhViewer.iml
+++ b/EhViewer.iml
@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" external.system.module.group="" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
+<module external.linked.project.id="EhViewer" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$" external.system.id="GRADLE" external.system.module.group="" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
   <component name="FacetManager">
     <facet type="java-gradle" name="Java-Gradle">
       <configuration>
         <option name="BUILD_FOLDER_PATH" value="$MODULE_DIR$/build" />
+        <option name="BUILDABLE" value="false" />
       </configuration>
     </facet>
   </component>
@@ -15,5 +16,4 @@
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
-</module>
-
+</module>
\ No newline at end of file
diff --git a/app/app.iml b/app/app.iml
index 4fc7e1434..9648c37ef 100644
--- a/app/app.iml
+++ b/app/app.iml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<module external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" external.system.module.group="EhViewer" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
+<module external.linked.project.id=":app" external.linked.project.path="$MODULE_DIR$" external.root.project.path="$MODULE_DIR$/.." external.system.id="GRADLE" external.system.module.group="EhViewer" external.system.module.version="unspecified" type="JAVA_MODULE" version="4">
   <component name="FacetManager">
     <facet type="android-gradle" name="Android-Gradle">
       <configuration>
@@ -12,8 +12,9 @@
         <option name="SELECTED_TEST_ARTIFACT" value="_android_test_" />
         <option name="ASSEMBLE_TASK_NAME" value="assembleDebug" />
         <option name="COMPILE_JAVA_TASK_NAME" value="compileDebugSources" />
-        <option name="ASSEMBLE_TEST_TASK_NAME" value="assembleDebugAndroidTest" />
         <option name="SOURCE_GEN_TASK_NAME" value="generateDebugSources" />
+        <option name="ASSEMBLE_TEST_TASK_NAME" value="assembleDebugAndroidTest" />
+        <option name="COMPILE_JAVA_TEST_TASK_NAME" value="compileDebugAndroidTestSources" />
         <option name="TEST_SOURCE_GEN_TASK_NAME" value="generateDebugAndroidTestSources" />
         <option name="ALLOW_USER_CONFIGURATION" value="false" />
         <option name="MANIFEST_FILE_RELATIVE_PATH" value="/src/main/AndroidManifest.xml" />
@@ -83,13 +84,12 @@
       <excludeFolder url="file://$MODULE_DIR$/build/outputs" />
       <excludeFolder url="file://$MODULE_DIR$/build/tmp" />
     </content>
-    <orderEntry type="jdk" jdkName="Android API 21 Platform" jdkType="Android SDK" />
+    <orderEntry type="jdk" jdkName="Android API 22 Platform" jdkType="Android SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" exported="" name="support-v4-22.0.0" level="project" />
     <orderEntry type="library" exported="" name="svg-android-2.0.6" level="project" />
-    <orderEntry type="library" exported="" name="support-annotations-21.0.3" level="project" />
-    <orderEntry type="library" exported="" name="support-v4-21.0.3" level="project" />
+    <orderEntry type="library" exported="" name="support-annotations-22.0.0" level="project" />
     <orderEntry type="library" exported="" name="libGoogleAnalyticsServices" level="project" />
-    <orderEntry type="library" exported="" name="recyclerview-v7-21.0.3" level="project" />
+    <orderEntry type="library" exported="" name="recyclerview-v7-22.0.0" level="project" />
   </component>
-</module>
-
+</module>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index cb8d1a2ba..d945a94c5 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion "21.1.2"
+    compileSdkVersion 22
+    buildToolsVersion "22"
 
     defaultConfig {
         applicationId "com.hippo.ehviewer"
         minSdkVersion 14
-        targetSdkVersion 21
+        targetSdkVersion 22
         versionCode 36
         versionName "0.6.12"
     }
@@ -25,7 +25,7 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:support-v4:21.0.3'
-    compile 'com.android.support:recyclerview-v7:21.0.3'
+    compile 'com.android.support:support-v4:22.0.0'
+    compile 'com.android.support:recyclerview-v7:22.0.0'
     compile 'com.github.japgolly.android:svg-android:2.0.6'
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/util/DateUtils.java b/app/src/main/java/com/hippo/ehviewer/util/DateUtils.java
index a6f8b22cd..6e8e4cefe 100644
--- a/app/src/main/java/com/hippo/ehviewer/util/DateUtils.java
+++ b/app/src/main/java/com/hippo/ehviewer/util/DateUtils.java
@@ -16,17 +16,15 @@
 
 package com.hippo.ehviewer.util;
 
-import android.text.format.DateFormat;
-
 public final class DateUtils {
 
-    @SuppressWarnings("deprecation")
+    public  static final char QUOTE = '\'';
+    public  static final char SECONDS = 's';
+
     public static boolean hasSeconds(CharSequence inFormat) {
-        return hasDesignator(inFormat, DateFormat.SECONDS);
+        return hasDesignator(inFormat, SECONDS);
     }
 
-
-    @SuppressWarnings("deprecation")
     public static boolean hasDesignator(CharSequence inFormat, char designator) {
         if (inFormat == null) return false;
 
@@ -39,7 +37,7 @@ public final class DateUtils {
             count = 1;
             c = inFormat.charAt(i);
 
-            if (c == DateFormat.QUOTE) {
+            if (c == QUOTE) {
                 count = skipQuotedText(inFormat, i, length);
             } else if (c == designator) {
                 return true;
@@ -49,9 +47,8 @@ public final class DateUtils {
         return false;
     }
 
-    @SuppressWarnings("deprecation")
     private static int skipQuotedText(CharSequence s, int i, int len) {
-        if (i + 1 < len && s.charAt(i + 1) == DateFormat.QUOTE) {
+        if (i + 1 < len && s.charAt(i + 1) == QUOTE) {
             return 2;
         }
 
@@ -62,10 +59,10 @@ public final class DateUtils {
         while (i < len) {
             char c = s.charAt(i);
 
-            if (c == DateFormat.QUOTE) {
+            if (c == QUOTE) {
                 count++;
                 //  QUOTEQUOTE -> QUOTE
-                if (i + 1 < len && s.charAt(i + 1) == DateFormat.QUOTE) {
+                if (i + 1 < len && s.charAt(i + 1) == QUOTE) {
                     i++;
                 } else {
                     break;