unknown property 'LibraryVariants' in build.gradle

Question

I have the error below in build.gradle at this line:

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

Error:(56, 0) Could n

Answer 1

Add the following to the @project level gradle file:

classpath 'com.android.tools.build:gradle:1.3.0'
classpath 'com.google.gms:google-services:3.0.0'

Add the following to the @app level gradle file:

// Dependency for Google Sign-In
compile 'com.google.android.gms:play-services-auth:9.4.0'

Apply plugin

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