即使使用正确的参数，Android AlarmManager也会立即触发？

Question

我从我主要Activity的onCreate设置AlamManager。

这里是方法

public void scheduleAdsUpdateAlarm() { 
    long THEE_HOURS = 3 * 60 * 60 * 1000; 
    long THREE_MINUTES= 3*60*1000; 
    long UNTIL_FIRST_TRIGGER = THREE_MINUTES; 

    // Construct an intent that will execute the AlarmReceiver 
    Intent intent = new Intent(getApplicationContext(), AdsUpdateAlarmReceiver.class); 

    // Create a PendingIntent to be triggered when the alarm goes off 
    final PendingIntent pIntent = PendingIntent.getBroadcast(this, AdsUpdateAlarmReceiver.REQUEST_CODE, 
      intent, PendingIntent.FLAG_UPDATE_CURRENT); 

    AlarmManager alarm = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE); 

    if(alarm != null){ 
     alarm.cancel(pIntent); 
     alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, UNTIL_FIRST_TRIGGER, 
       THREE_MINUTES, pIntent); 
    } 
} 

正如你可以看到报警设置三分钟与初始启动每三小时运行。

问题是当onCreate和下面的警报设置被调用时警报立即熄灭。我不明白我在做什么错了？

Answer 1

alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, UNTIL_FIRST_TRIGGER, 
THREE_MINUTES, pIntent); 

应改为：

alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + UNTIL_FIRST_TRIGGER, THREE_MINUTES, pIntent); 

由于alarm.setInexactRepeating的第二个参数是不从现在值的毫秒但实际时间值。