build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        mavenCentral()
        jcenter()
        maven {
            url {
                'https://raw.github.com/kolavar/android-support-v4-preferencefragment/master/maven-repository/'
            }
        }
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
//        classpath 'org.robolectric:robolectric-gradle-plugin:0.11.+'

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

allprojects {
    repositories {
        mavenCentral()
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}