android - 从 AlarmManager 中删除特定的警报

Question

我想删除我在 Broadcastreceiver 中设置的警报。这是它应该如何执行:

我收到一条 GCM 消息，其中包含一个 user_state 字段。

if user_state is 0 no notification is triggeredif user_state is 1 a notification is triggeredif user_state is 2 an Alarm is set and the notification is triggered 20 Minutes later.

This all works well.

Now I want to delete an specific Alarm, depending on the Data received from the GCM-intent.Unfortunately AlarmManager.cancel() does not compare Extra fields.I also tried to use intent.setType("data to compare") but if I set this field the Broadcast is not received...

I have now tried to register a new BroadcastReceiver with the Data which should be compared in the Action field. As I understand, this should work fine, BUT it is not possible to register a BroadcastReceiver from within a BroadcastReceiver.

Also it is not possible to get a list of Pendingintents from the AlarmManager.So all i can do now is delete ALL alarms - which is not an option,

The only other idea I have is using my own Service instead of the AlarmManager... I would like to avoid that one. I don't want to use extra Resources when there is an buildin Option.

Here is my set Alarm Method:

private void setTimed(Intent intent, Notify notify) {
    Bundle bundle = intent.getExtras();
    bundle.remove("userstate");
    bundle.putString("userstate", "3");

    Intent ringintent = new Intent("de.pluetzner.waveobserver.TRECEIVE");
    ringintent.setType(notify.getHost()+"&&&"+notify.getService());
    ringintent.putExtras(bundle);
    AlarmManager am = (AlarmManager) this.context.getSystemService(this.context.ALARM_SERVICE);
    PendingIntent pi = PendingIntent.getBroadcast(this.context, 0, ringintent, 0);
    am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (this.waittime * 60 * 1000), pi);
    Log.d("timer", "time set");
}

ringintent.setType() 应该是警报的标识符，但它不起作用。没有这个，就会收到警报

这里是删除报警的方法。

private void deleteAlarm(Intent intent, Notify notify) {
    Intent ringintent = new Intent("de.pluetzner.waveobserver.TRECEIVE");
    ringintent.setType(notify.getHost() + "&&&" + notify.getService());
    PendingIntent pi = PendingIntent.getBroadcast(this.context, 0, ringintent, 0);
    AlarmManager am = (AlarmManager) this.context.getSystemService(this.context.ALARM_SERVICE);
    am.cancel(pi);
    Log.d("timer", "time removed");
}

这里是一样的 - setType 设置不起作用。没有它，它会删除所有警报。

我也知道这会以某种方式滥用 setType - 但我没有想法。你有吗？

Answer 1

getBroadcast的RequestCode参数方法唯一标识每个 PendingIntent。

您可以为每个 PendingIntent 分配一个唯一的整数代码。

报警1:

      PendingIntent pi = PendingIntent.getBroadcast(this.context, 1, ringintent, 0); 

报警2:

      PendingIntent pi = PendingIntent.getBroadcast(this.context, 2, ringintent, 0); 

现在如果你想单独杀死 Alarm2，重新创建具有相同标识符的 PendingIntent，然后调用 AlarmManager 的取消方法

      PendingIntent sender = PendingIntent.getBroadcast(this, 2, intent, 0);
      AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
      alarmManager.cancel(sender);