what's wrong with my Android Studio or my config? Error:(22, 0) Could not find method jackOptions() for arguments [build_1b0umrzpkhcolzr325bxbizec$_run_closure1$_closure5@41c39fc1] on project ':app' of type org.gradle.api.Project. and this is my build.gradle android { compileSdkVersion 23 buildToolsVersion "23.0.3" defaultConfig { applicationId "com.twtstudio.wepeiyanglite" minSdkVersion 14 targetSdkVersion 23 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } jackOptions { enabled true } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } // Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.2.0-beta1' classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() } } task clean(type: Delete) { delete rootProject.buildDir } I guess the jack is not enabled in my develop enviroment , and how to find out the mistakes and fix it? I have already installed the jdk1.8