Unregister a device from GCM using registration Id in Android

Question

I have a list of GCM registered users and their corresponding registration Ids in a database table, and I actually want to unregister a user whenever he/she is deleted from

Answer 1

unregister() is now deprecated:

https://developers.google.com/android/reference/com/google/android/gms/gcm/GoogleCloudMessaging.html#unregister()

Quoting the docs you should call:

Instead use InstanceID.deleteToken() or InstanceID.deleteInstanceID().