Use jack and jill

app/build.gradle

@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    buildToolsVersion "24.0.0 rc3"
 
     defaultConfig {
         applicationId "com.hippo.ehviewer"
@@ -12,6 +12,15 @@ android {
         versionName "1.0.6"
         vectorDrawables.useSupportLibrary = true
         resConfigs "zh", "zh-rCN", "zh-rHK", "zh-rTW"
+
+        jackOptions {
+            enabled true
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 
     lintOptions {

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.12-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.13-all.zip