private void handleRegistration(final Context context, Intent intent) { GCMRegistrar.cancelAppPendingIntent(); String registrationId = intent.getStringExtra(EXTRA_REGISTRATION_ID); String error = intent.getStringExtra(EXTRA_ERROR); String unregistered = intent.getStringExtra(EXTRA_UNREGISTERED); mLogger.log( Log.DEBUG, "handleRegistration: registrationId = %s, " + "error = %s, unregistered = %s", registrationId, error, unregistered); // registration succeeded if (registrationId != null) { GCMRegistrar.resetBackoff(context); GCMRegistrar.setRegistrationId(context, registrationId); onRegistered(context, registrationId); return; } // unregistration succeeded if (unregistered != null) { // Remember we are unregistered GCMRegistrar.resetBackoff(context); String oldRegistrationId = GCMRegistrar.clearRegistrationId(context); onUnregistered(context, oldRegistrationId); return; } // last operation (registration or unregistration) returned an error; // Registration failed if (ERROR_SERVICE_NOT_AVAILABLE.equals(error)) { boolean retry = onRecoverableError(context, error); if (retry) { int backoffTimeMs = GCMRegistrar.getBackoff(context); int nextAttempt = backoffTimeMs / 2 + sRandom.nextInt(backoffTimeMs); mLogger.log( Log.DEBUG, "Scheduling registration retry, backoff = %d (%d)", nextAttempt, backoffTimeMs); Intent retryIntent = new Intent(INTENT_FROM_GCM_LIBRARY_RETRY); retryIntent.setPackage(context.getPackageName()); PendingIntent retryPendingIntent = PendingIntent.getBroadcast(context, 0, retryIntent, 0); AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); am.set( AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + nextAttempt, retryPendingIntent); // Next retry should wait longer. if (backoffTimeMs < MAX_BACKOFF_MS) { GCMRegistrar.setBackoff(context, backoffTimeMs * 2); } } else { mLogger.log(Log.VERBOSE, "Not retrying failed operation"); } } else { // Unrecoverable error, notify app onError(context, error); } }