Android通知延迟

Question

我在android中发出通知，但在通知出现之前我有一个小的延迟 - 这是正常的吗？这里是我的代码：

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)指从now5seconds。