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'
        // Add this line
        classpath 'com.google.gms:google-services:4.0.1'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url "https://github.com/QuickBlox/quickblox-android-sdk-releases/raw/master/"
        }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}
// Define versions in a single place
ext {
    // Sdk and tools
    minSdkVersion = 18
    targetSdkVersion = 26
    compileSdkVersion = 26
    buildToolsVersion = '26.0.1'

    //retrofit
    retroVersin = '2.0.2'
    gsonVersion = '2.8.2'
    retroLoginterceptor = '3.2.0'

    // App dependencies
    supportLibraryVersion = '26.0.+'
    calligraphyVersion = '2.2.0'
    glideVersion = '3.7.0'
    butterKnife = '8.8.1'

    dagger2Version = '2.14.1'
    placeholderviewVersion = '0.7.2'

    // Test dependencies
    junitVersion = '4.12'
    espressoVersion = '3.0.1'
    mockitoVersion = '2.15.0'

    //google services
    googleService='11.0.4'
    quickBlox='3.3.0'
}