tools/android_project_stubs/example/build.gradle

// 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:2.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files

        // Use the Android SDK manager, which will automatically download
        // the required Android SDK.
        classpath 'com.jakewharton.sdkmanager:gradle-plugin:0.12.0'
    }
}

apply plugin: 'android-sdk-manager'

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}