我怎么能在10秒后取消闹铃？

Question

我这里有一个问题。我想设置一个报警，然后在10秒后自动停止。我用下面的代码，但10秒后不会停止。

这里是我的活动setAlarm方法：

public void setAlarm(int hour, int minute) {
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    // Set the alarm to start at "hour"
    Date date = new Date();
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(date);
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, minute);
    calendar.set(Calendar.SECOND, 0);


    Intent i = new Intent(AccueilPA.this, MyBroadcastReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(AccueilPA.this, 10, i, 0);
    alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
    new CountDownTimer(10000, 1000) {

        public void onTick(long millisUntilFinished) {
        }

        public void onFinish() {
            test = true;
        }
    }.start();
    // If the alarm has been set, cancel it.
    if (alarmManager != null && test) {
        alarmManager.cancel(pendingIntent);
    }


}

Answer 1

该的PendingIntent需要创建，正是因为它是当您启动AlarmManager。你已经在创建它的待定意图请求代码为10。你必须使用相同的取消。

创建报警：

    private void createalarm(int hour , int minute){

    Date date = new Date();
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(date);
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, minute);
    calendar.set(Calendar.SECOND, 0);


    Intent myIntent = new Intent(getApplicationContext(), MyReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(
            getApplicationContext(), 1, myIntent,
            PendingIntent.FLAG_UPDATE_CURRENT);

    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
    Log.i("TestAlarm" , " Created Alarm");

    new CountDownTimer(10000, 1000) {

        public void onTick(long millisUntilFinished) {
        }

        public void onFinish() {
           cancelAlarm();
        }
    }.start();

}

取消报警方式：

    private void cancelAlarm(){
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    Intent myIntent = new Intent(getApplicationContext(), MyReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(
            getApplicationContext(), 1, myIntent,
            PendingIntent.FLAG_UPDATE_CURRENT);

    alarmManager.cancel(pendingIntent);

    Log.i("TestAlarm" , " Cancelled Alarm");
}

广播接收器类别：

public class MyReceiver extends BroadcastReceiver {

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

    Log.i("TestAlarm" , "Alarm Triggered!");
  }
}