build.gradle

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

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.google.gms:google-services:3.0.0'
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url "https://www.jitpack.io" }
        mavenCentral()
    }
}

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

ext {
    //Android SDK
    minSdkVersion = 21
    targetSdkVersion = 25
    compileSdkVersion = 25
    buildToolsVersion = '25.0.2'
    supportLibraryVersion = '25.3.1'

    //3rd-party
    butterKnifeVersion = '8.6.0'    //inject views
    eventBusVersion = '3.0.0'       //event bus
    daggerVersion = '2.11'          //dependency injection
    dartVersion = '2.0.2'           //intent builder
    glideVersion = '4.0.0-RC0'      //image loader
    clarifaiVersion = '2.2.6'       //clarifai
    retrofitVersion = '2.3.0'       //retrofit
    gsonVersion = '2.8.1'
    facebookSdkVersion = '[4,5)'
    firebaseVersion = '10.0.1'
}