Android应用中无法设置闹钟的启动时间如何解决

//开启轮询服务 public static void startPollingService(Context context, int seconds, Class<&#63;> cls,String action) { //获取AlarmManager系统服务 AlarmManager manager = (AlarmManager) context .getSystemService(Context.ALARM_SERVICE);  //包装需要执行Service的Intent Intent intent = new Intent(context, cls); intent.setAction(action); PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);  //触发服务的起始时间 long triggerAtTime = SystemClock.elapsedRealtime();  //使用AlarmManger的setRepeating方法设置定期执行的时间间隔（seconds秒）和需要执行的Service manager.setRepeating(AlarmManager.ELAPSED_REALTIME, triggerAtTime, seconds * 1000, pendingIntent); }