build.gradle

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

buildscript {
    
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath "com.google.protobuf:protobuf-gradle-plugin:0.8.3"
        classpath 'me.tatarka:gradle-retrolambda:3.6.1'



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

allprojects {
    repositories {
        google()
        jcenter()
    }
}

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

ext {
    butterKnifeVersion = '8.8.1'
    rxjava2Version = '2.0.6'
    rxandroidVersion = '2.0.1'
    gsonVersion = '2.8.0'
    okHttpVersion = '3.9.1'
    retrofitVersion = '2.3.0'
    retrofitScalarConverterVersion = '2.0.1'
    retrofitGsonConverterVersion = '2.1.0'
    rxjava2AdapterVersion = '2.3.0'


}