怪异的报警管理者行为

Question

我有两个广播接收器和两个意图，我想点击一个按钮，5米后开始广播1和10米后开始广播2，发生的是它们都在我点击后10米开始，我猜，意图不是唯一的，但我为它们每个设置了不同的reqeustCode。

按钮的onclick：

    Bundle bd = new Bundle();
    bd.putInt("mInt", i);

    Intent intent1 = new Intent(getActivity(), Broadcast_1.class);
    intent1.putExtras(bd);
    PendingIntent pendingIntent1 = PendingIntent.getBroadcast(getActivity().getApplicationContext(), i, intent1, PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager alarmManager1 = (AlarmManager) getActivity().getApplicationContext().getSystemService(Context.ALARM_SERVICE);
    alarmManager1.setRepeating(AlarmManager.RTC, System.currentTimeMillis()+1000*60*5, 1000*60*10, pendingIntent1);
    Toast.makeText(getActivity(), "countdown started "+i ,Toast.LENGTH_SHORT).show();

    Intent intent2 = new Intent(getActivity(), Broadcast_1.class);
    intent2.putExtras(bd);
    PendingIntent pendingIntent2 = PendingIntent.getBroadcast(getActivity().getApplicationContext(), i+42212342, intent2, PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager alarmManager2 = (AlarmManager) getActivity().getApplicationContext().getSystemService(Context.ALARM_SERVICE);
    alarmManager2.setRepeating(AlarmManager.RTC, System.currentTimeMillis()+1000*60*10, 1000*60*10, pendingIntent2);

public class Broadcast_1 extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        Calendar c = Calendar.getInstance();
        int seconds = c.get(Calendar.SECOND);
        int minutes = c.get(Calendar.MINUTE);
        ShowTextFragment.setText("Broadcast_1" + " at " + minutes + " : " + seconds);

    }

}

Answer 1

您现在看到的问题是重复警报的工作方式。为了保持电池寿命，AlarmManager现在可以很自由地重新调度警报，以便将多个警报分组在一起。基本上，如果您需要任何类型的精确定时，您应该忘记使用setrepeating()。改用setexact()。如果你需要一个重复警报，只需在它熄灭时重置它。