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I have a hudge problem with disabling alarms form AlarmManager on Android.

I have read several articles and answers here and no clue why my cancel() for alarm does not work.

I have even changed my code to this, with static variables... (and still does not work) the code is stored in Utility.class other than the one which calls the method.

public class Utilities {
public static final int ID_FOR_STOP_ALARM = 770;

private static PendingIntent piStopMyApp;
private static Intent aiStopMyApp;
private static Context aContext;

public static boolean toggleAlarmToStopMyApp(Context context) {

    if(aContext == null){
        aContext = context;
    }

    if (aiStopMyApp == null) {
        aiStopMyApp = new Intent(aContext, MyAppServiceStop.class);
    }

    PendingIntent piStopMyAppCheck = PendingIntent.getService(aContext,
            ID_FOR_STOP_ALARM, aiStopMyApp, PendingIntent.FLAG_UPDATE_CURRENT);

    AlarmManager alarm = (AlarmManager) aContext
            .getSystemService(Context.ALARM_SERVICE);

    if (piStopMyApp == null) {
        piStopMyApp = PendingIntent.getService(aContext, ID_FOR_STOP_ALARM,
                      aiStopMyApp, PendingIntent.FLAG_UPDATE_CURRENT);
    }
    if (piStopMyAppCheck == null) {

        SharedPreferences p = aContext.getSharedPreferences(
                Utilities.APP_SHARED_PREFS, Context.MODE_PRIVATE);

        int h = p.getInt(Utilities.ALARM_STOP_H, 23);
        int m = p.getInt(Utilities.ALARM_STOP_M, 0);

        Calendar cur_cal = new GregorianCalendar();
        cur_cal.setTimeInMillis(System.currentTimeMillis());
        Calendar cal = new GregorianCalendar();
        cal.set(Calendar.YEAR, cur_cal.get(Calendar.YEAR));
        cal.set(Calendar.MONTH, cur_cal.get(Calendar.MONTH));
        cal.set(Calendar.DAY_OF_MONTH, cur_cal.get(Calendar.DAY_OF_MONTH));
        cal.set(Calendar.HOUR_OF_DAY, h);
        cal.set(Calendar.MINUTE, m);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);

        if (isLoggingEnabled) {
            Log.d(TAG, "Enable ALARM for STOP " + cal.toString());
        }

        alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, piStopMyApp);

    } else {

        alarm.cancel(piStopMyApp);

        if (isLoggingEnabled) {
            Log.d(TAG, "Disable ALARM for STOP = "
                + (PendingIntent.getService(aContext,
                            ID_FOR_STOP_ALARM,aiStopMyApp,
                    PendingIntent.FLAG_NO_CREATE) == null));
        }

    }

    piStopMyAppCheck = null;

    return (PendingIntent.getService(aContext, ID_FOR_STOP_ALARM, aiStopMyApp,

            PendingIntent.FLAG_NO_CREATE) != null);
}

}

and it simply does not work, enables alarm and cannot disable it :-(

button in other activity runs such code:

    boolean alarmUpStop  = Utilities.toggleAlarmToStopMyApp(getApplicationContext());

1) the first hit to the button above and Alarms are scheduled properly, logs shows service triggered

2) the second hit to the button and logs say that alarm was tried to disable but it wasn't disabled :-(

Any clue?

4

2 回答 2

0

我无法让它工作，因为使用以下方法检查警报是否正在运行：(PendingIntent.getService(aContext, ID_FOR_STOP_ALARM,aiStopMyApp, PendingIntent.FLAG_NO_CREATE) == null)

我只是简单地将其更改为：

1）运行警报时，我将 alarmRunning = true 存储在 Prefs 中以知道警报处于活动状态

2）取消警报时，我在 Prefs 中设置 alarmRunning = false 以知道警报已禁用

在启动时，我知道 Prefs 的最后状态，如有必要，我可以重新创建警报

此解决方法有缺陷但有效，它只是假设设置警报时，无论如何[直到启动]都必须由系统保留，但它应该是这样:-)

下期Qs见。五。

于 2013-11-09T19:53:59.573 回答
0

您可以使用以下方法检查警报是否处于活动状态：

PendingIntent.getService(aContext, ID_FOR_STOP_ALARM,aiStopMyApp,
                       PendingIntent.FLAG_NO_CREATE) != null

你的比较null是错误的。的文档PendingIntent.FLAG_NO_CREATE不正确。null如果没有匹配则返回PendingIntent，否则返回匹配PendingIntent。

于 2014-03-14T09:54:46.740 回答