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

Question

I followed google documentation to integrate my app to Google Analytics. But when adding

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

and b

Answer 1

Add the following to the @project level gradle file:

    classpath 'com.android.tools.build:gradle:2.3.0'
    classpath 'com.google.gms:google-services:3.0.0'