build.gradle

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

buildscript {
    
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0-alpha01'
        classpath 'com.google.gms:google-services:3.1.0'


        // 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 {
    minSdkVersion = 16
    targetSdkVersion = 26
    compileSdkVersion = 26
    buildToolsVersion = '25.0.2'

    supportLibraryVersion = '27.0.0'
    constraintLayout = '1.0.2'
    gsonVersion = '2.8.0'
    calligraphyVersion = '2.2.0'
    glideVersion = '3.7.0'
    playServicesAuthVersion = '11.6.0'

    dagger2Version = '2.8'
    rxjava2Version = '2.1.6'
    rxandroidVersion = '2.0.1'
    butterKnifeVersion = '8.6.0'
    debugDBVersion = '1.0.0'
    timberVersion = '4.5.1'
    retrofitVersion = '2.3.0'
    retrofit2Rxjava2AdapterVersion = '2.3.0'
    okHttpVersion = '3.9.0'
    roomVersion = '1.0.0-alpha7'
}