apply plugin: 'com.google.gms.google-services'

implementation 'com.google.firebase:firebase-core:XX.X.X'
implementation 'com.google.firebase:firebase-messaging:XX.X.X'

<string name="google_app_id" translatable="false">X:XXXXXXXXXX:android:XXXXXXXXXXXXX</string>

public static void start(Context context){
    FirebaseOptions options = new FirebaseOptions.Builder()
            .setApplicationId("X:XXXXXXXXXX:android:XXXXXXXXXXXXX") // Required for Analytics.
            .setApiKey("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX") // Required for Auth.
            .build();
    FirebaseApp.initializeApp(context, options);
}

LibName.start(getApplicationContext());