android - 警报未决警报不会取消

Question

我在 Stackoverflow 上通读了很多问题和答案，其中很多只是强调 .cancel() 和特殊的唯一 ID。但是，现在无论尝试多少次，我都无法取消它。

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我的唯一ID

final static int RQS_1 = 1337;

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我的 setAlarm 函数。 pickTime 是当前 Activity，而 timesUp 是另一个 Service 类，它在时间到了时显示 toast 。

Intent intent = new Intent(pickTime.this, timesUp.class);
PendingIntent timesUpIntent = PendingIntent.getService(pickTime.this, RQS_1, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),
                 timesUpIntent);
alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(), timesUpIntent);

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我的cancelAlarm函数

Intent intent = new Intent(this, pickTime.class);
PendingIntent timesUpIntent = PendingIntent.getBroadcast(this, RQS_1, intent, 0);
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        if (timesUpIntent != null) {
            alarmManager.cancel(timesUpIntent);
            timesUpIntent.cancel();
            Toast.makeText(getApplicationContext(), "Alarm is cancelled",
                    Toast.LENGTH_SHORT).show();
                    } else {

            Toast.makeText(getApplicationContext(), "Unable to stop timer",
                    Toast.LENGTH_SHORT).show();
        }

---

我的 timesUp 服务

public class timesUp extends Service {

    @Override
    public void onCreate() {

        // TODO Auto-generated method stub

        Toast.makeText(this, "MyAlarmService.onCreate()", Toast.LENGTH_LONG)
                .show();

    }

    @Override
    public IBinder onBind(Intent intent) {

        // TODO Auto-generated method stub

        Toast.makeText(this, "MyAlarmService.onBind()", Toast.LENGTH_LONG)
                .show();

        return null;

    }

    @Override
    public void onDestroy() {

        // TODO Auto-generated method stub

        super.onDestroy();

        Toast.makeText(this, "MyAlarmService.onDestroy()", Toast.LENGTH_LONG)
                .show();

    }

    @Override
    public void onStart(Intent intent, int startId) {

        // TODO Auto-generated method stub

        super.onStart(intent, startId);

        Toast.makeText(this, "MyAlarmService.onStart()", Toast.LENGTH_LONG)
                .show();

    }

    @Override
    public boolean onUnbind(Intent intent) {

        // TODO Auto-generated method stub

        Toast.makeText(this, "MyAlarmService.onUnbind()", Toast.LENGTH_LONG)
                .show();

        return super.onUnbind(intent);

    }

}

Answer 1

要取消 Alarm，您必须创建与启动它时相同的 PendingIntent。你在做的同时开始，

Intent intent = new Intent(pickTime.this, timesUp.class);
PendingIntent timesUpIntent = PendingIntent
                                .getService(pickTime.this, RQS_1, intent, 0);

你正在做的同时取消，

Intent intent = new Intent(this, pickTime.class);
PendingIntent timesUpIntent = PendingIntent
                                        .getBroadcast(this, RQS_1, intent, 0);

Are they same?

不，它们不一样。您正在为 Service 创建 PendingIntent 以启动并尝试使用 BroadCast 的不同 PendingIntent 取消。