java - Android AlarmManager.cancel() 实际上并没有取消闹钟/PendingIntent

Question

尝试取消 AlarmManager 警报，但不太有效。

我像这样创建一个 PendingIntent:

static PendingIntent makePendingIntent(int id, Bundle bundle)
{
    Intent intent = new Intent(mContext.getApplicationContext(), mfLocalNotificationManager.class);
    if(bundle != null)
    {
        intent.putExtra(BUNDLE_ID, bundle);
    }

    return PendingIntent.getBroadcast(mContext.getApplicationContext(), id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

}

从 SendLocalNotification 调用:

public static int SendLocalNotification(String title, String text, String tickerText, 
        int timeSent, int timeOffset, String sound)
{

    AlarmManager alarmMgr = 
        (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);   

    Bundle notificationData = new Bundle();
    notificationData.putString("title", title);
    notificationData.putString("text", text);
    notificationData.putString("tickerText", tickerText);
    /*snip, bundle stuff*/

    int noteID = title.hashCode();        

    notificationData.putInt("noteID", noteID);

    PendingIntent pendingIntent = makePendingIntent(noteID, notificationData);

    if( pendingIntent == null )
    {
            //This should probably be flagged as an error or an assertion. 
        Log.d("[MF_LOG]", "Java intent is null");
            return -1;
    }

    //This isn't my timing code, don't hate me for it
    Calendar time = Calendar.getInstance();
    time.setTimeInMillis(System.currentTimeMillis());
    time.add(Calendar.SECOND, timeOffset);

    alarmMgr.set(AlarmManager.RTC_WAKEUP, time.getTimeInMillis(),
                 pendingIntent);

return noteID;
}

并尝试像这样取消它(传递我们之前从 SendLocalNotification 返回的 id):

public static void CancelNotification(int id)
{
    String ns = Context.NOTIFICATION_SERVICE;

    AlarmManager alarmMgr = 
            (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);

    PendingIntent pendingIntent = makePendingIntent(id, null);

    //This doesn't work...
    pendingIntent.cancel(); //<- added based on SO post, doesn't help
    alarmMgr.cancel(pendingIntent);
}

似乎什么都不起作用，我已经遵循了我能找到的其他帖子上的尽可能多的建议(确保 ID 相同，确保重新创建的 PendingIntent 完全相同)，但它似乎仍然崩溃。附带说明一下，尝试使用标志 PendingIntent.FLAG_NO_CREATE 检查通知是否存在也不起作用，而是创建一个新对象而不是返回 null。

我正在测试的设备是 Nexus 7，我正在针对 API 9 进行构建。

Answer 1

您需要重新创建您的 Intent 并像这样取消它:

AlarmManager alarm = (AlarmManager) context.getSystemService(ALARM_SERVICE);
PendingIntent peding = PendingIntent.getActivity(context, code, intent,     
                                                 PendingIntent.FLAG_CANCEL_CURRENT);
alarm.cancel(peding);