Android Studio:How add gradle plug-in in jar file

How add gradle plug-in in jar file

Find the jar file and put it inside app/libs. Meanwhile add the following to build.gradle for the whole project.

buildscript {
    repositories {
        mavenLocal()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.2'
        //classpath fileTree(dir: 'libs', include: ['*.jar'])
        //classpath 'me.tatarka:gradle-retrolambda:3.2.4' //加上这句依赖，这会使用retrolambda来编译Java代码
        classpath fileTree(dir: 'app/libs',
                includes: ['gradle-retrolambda-3.2.4.jar'])
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}