多个火警在同一时间 [英] Multiple Alarm fire at same time

问题描述

我有触发在第一时间报警多的一个问题，这是我的code

i have a problem with triggering the multiple alarm at first time , here is my code

这就是我写下面的code ::发射活动

it is launcher activity where i write the following code ::

** onCreate方法：

**onCreate Method :

// Calling Method setNextAlarm two times..with different id and time 

    setNextAlarm(0,60000);
    setNextAlarm(1,120000);

和setNextAlarm在这里::

and the setNextAlarm is here ::

    private void setNextAlarm(int id,long time) {
            AlarmManager mgr = (AlarmManager) TestAct.this
            .getSystemService(Context.ALARM_SERVICE);
            Intent i = new Intent(TestAct.this, OnBootReceiver.class);
            i.putExtra("id", id);

            Log.e("Firing up next alarm in "+id,""+time/(60*1000) +"minutes");

            PendingIntent pi = PendingIntent.getBroadcast(TestAct.this, id, i,PendingIntent.FLAG_ONE_SHOT);
            mgr.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, time, pi);
   }

当我运行该code，它调用onBootReceiver这是我们的广播接收器类。

when i run this code it calls the onBootReceiver which is our Broadcast receiver class.

所以我的问题是：

限定在该方法的不同的时间和id之后

After defining the different time and id in this method

setNextAlarm(0,60000);
setNextAlarm(1,120000);

为什么火的同一时间？除第一次运行在固定的时间间隔罚款。

这是我onBootReceiver类的方法的onReceive

this is my onBootReceiver class's onReceive method

Bundle b = intent.getExtras();  

int id = b.getInt("id");

if(id==1){
    PERIOD=300000;
}else{
    PERIOD=120000;
}

Log.e("OnBootReceiver"," Calling"+id+" in "+PERIOD/60000 + "minutes");

AlarmManager mgr=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
   Intent i=new Intent(context, OnAlarmReceiver.class);
   i.putExtra("id", id);
   PendingIntent pi=PendingIntent.getBroadcast(context, id,i, 0);
   mgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                      SystemClock.elapsedRealtime()+60000,
                      PERIOD,
                      pi);

感谢。

推荐答案

在OnBootReceiver

in OnBootReceiver

mgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                    SystemClock.elapsedRealtime() + 60000, PERIOD, pi);

下面是变化

我设置

SystemClock.elapsedRealtime() + 60000  for id = 0

和设置

SystemClock.elapsedRealtime() + 120000  for id = 1

和问题的解决。

但是我仍然在等待更好的解释。

我发现这里有关的资料很少 SystemClock.elapsedRealtime（）

i found little information here about SystemClock.elapsedRealtime()

elapsedRealtime（）以毫秒为单位进行计数，因为系统引导，包括深度睡眠。这个时钟应测量可能跨越系统的睡眠周期的时间间隔时被使用。

elapsedRealtime() is counted in milliseconds since the system was booted, including deep sleep. This clock should be used when measuring time intervals that may span periods of system sleep.

http://developer.android.com/reference/android/os/ SystemClock.html

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