build.gradle

buildscript
{
    repositories
    {
        jcenter()
    }

    dependencies
    {
        classpath 'com.android.tools.build:gradle:2.3.3'
    }
}

allprojects
{
    repositories
    {
        jcenter()
    }
}

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