build.gradle

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

buildscript {
    
    repositories {
        google()
        jcenter()
        maven {
            name 'Sonatype SNAPSHOTs'
            url 'https://oss.sonatype.org/content/repositories/snapshots/'
        }
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.0'
        classpath 'com.google.gms:google-services:4.0.2'
        classpath 'com.jakewharton:butterknife-gradle-plugin:9.0.0-SNAPSHOT'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            name 'Sonatype SNAPSHOTs'
            url 'https://oss.sonatype.org/content/repositories/snapshots/'
        }
        mavenCentral()
    }
}

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