// Top-level build file where you can add configuration options common to all sub-projects/modules. buildscript { ext.compile_sdk_version = 27 ext.build_tools_version = "27.0.3" ext.min_sdk_version = 16 ext.target_sdk_version = 27 ext.android_support_version = "27.1.1" repositories { jcenter() google() } dependencies { classpath 'com.android.tools.build:gradle:3.1.2' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() google() } } task clean(type: Delete) { delete rootProject.buildDir }