此SERVICE_NOT_AVAILABLE
错误表示GCM Service
当前不可用。等待一段时间后再试。
这种情况发生了很多次(根据我的经验),所以不用担心。
参见GCMConstants
GCM Lib 的类。
/**
* The device can't read the response, or there was a 500/503 from the
* server that can be retried later. The application should use exponential
* back off and retry.
*/
public static final String ERROR_SERVICE_NOT_AVAILABLE =
"SERVICE_NOT_AVAILABLE";
有关更多调查handleRegistration()
,请参阅GCMBaseIntentService
private void handleRegistration(final Context context, Intent intent) {
String registrationId = intent.getStringExtra(EXTRA_REGISTRATION_ID);
String error = intent.getStringExtra(EXTRA_ERROR);
String unregistered = intent.getStringExtra(EXTRA_UNREGISTERED);
Log.d(TAG, "handleRegistration: registrationId = " + registrationId +
", error = " + error + ", unregistered = " + 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;
Log.d(TAG, "Registration error: " + 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);
Log.d(TAG, "Scheduling registration retry, backoff = " +
nextAttempt + " (" + backoffTimeMs + ")");
Intent retryIntent =
new Intent(INTENT_FROM_GCM_LIBRARY_RETRY);
retryIntent.putExtra(EXTRA_TOKEN, TOKEN);
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 {
Log.d(TAG, "Not retrying failed operation");
}
} else {
// Unrecoverable error, notify app
onError(context, error);
}
}