android - 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 not get unknown property 'LibraryVariants' for object of type com.android.build.gradle.LibraryExtension.

It happened after I installed Firebase.

How to solve this?

Answer 1

The error message, Error: Could not get unknown property 'LibraryVariants' for object of type com.android.build.gradle.LibraryExtension, indicates that this plugin needs to be applied to a module which uses the com.android.application plugin.

So, the simple solution is to only include the google-services plugin in your application module and not your library module:

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