GCM defaultSenderID

Question

Could somebody please help me understand what the gcm_defaultSenderId is in the following code (found in onHandleIntent in RegistrationIntentService.java):

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Answer 1

To solve this you just have to add apply plugin: 'com.google.gms.google-services' to your gradle.app module and classpath 'com.google.gms:google-services:1.3.0' to the dependencies of your gradle.app project

and of course, dont forget to add compile 'com.google.android.gms:play-services-gcm:8.1.0' to your gradle