Android通知延迟

Question

我正在android中发出通知，但是在通知出现之前我有一点延迟 - 这是正常的吗？这是我的代码：

final int REQUEST_CODE = 1;         
Intent intent = new Intent(Add_Assignment.this, Assignment_AlarmReceiver.class);
//Bundle stuff omitted for brevity
PendingIntent pendingIntent = 
      PendingIntent.getBroadcast(Add_Assignment.this, REQUEST_CODE, intent, 0);


AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, 
           System.currentTimeMillis() + (5 * 1000), pendingIntent);
Toast.makeText(Add_Assignment.this, "Alarm set", Toast.LENGTH_LONG).show();

Answer 1

System.currentTimeMillis() + (5 * 1000)表示来自5的{​​{1}} seconds。