MyGcmListenerService
extends GcmListenerService
MyInstanceIDListenerService
Extends InstanceIDListenerService
/**

• Called if InstanceID token is updated. This may occur if the security of
• the previous token had been compromised. This call is initiated by the
• InstanceID provider.
  */
  // [START refresh_token]
  @Override
  public void onTokenRefresh() { // Fetch updated Instance ID token and notify our app's server of any changes (if applicable). Intent intent = new Intent(this, RegistrationIntentService.class); startService(intent); }

  // [END refresh_token]

RegistrationIntentService
bespoke for purpose of handingling intentIDs and registering with service

Alternatively, developers who choose to not use the new GcmReceiver andGcmListenerService can implement their own GcmBroadcastReceiver to check for topic messages by looking at the from field.