/build.gradle

 1// Top-level build file where you can add configuration options common to all sub-projects/modules.
 2
 3buildscript {
 4    
 5    repositories {
 6        google()
 7        jcenter()
 8    }
 9    dependencies {
10        classpath 'com.android.tools.build:gradle:3.1.0'
11        
12
13        // NOTE: Do not place your application dependencies here; they belong
14        // in the individual module build.gradle files
15    }
16}
17
18allprojects {
19    repositories {
20        google()
21        jcenter()
22    }
23}
24
25task clean(type: Delete) {
26    delete rootProject.buildDir
27}