Android 通过切换按钮取消后警报未打开

我的MainActivity的OnCreate方法调用scheduleAlarm方法，我在另一个名为PollReceiver的类中实现了该方法。其中包含以下代码：

    Intent iWeekly = new Intent(context, ScheduledWeeklyService.class);
    PendingIntent piWeekly = PendingIntent.getBroadcast(context, 0, iWeekly, 0);

    AlarmManager alarmMgrWeekly = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    alarmMgrWeekly.setRepeating(AlarmManager.RTC_WAKEUP, scheduleTime, Constants.PERIOD_WEEKLY, piWeekly);

我的应用程序还有一个切换按钮来启用或禁用报警

togglebutton代码如下所示：

    public void enableDisableScheduler(View v){
        if (btnEnableDisableScheduler.isChecked()) {
            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctx);
            SharedPreferences.Editor editor = prefs.edit();
            editor.putBoolean("toggleButton", tb.isChecked()); 
            editor.commit();        

            // Enable all alarms
            PollReceiver.scheduleAlarms(this);

            Log.i(TAG, "alarm is turned on");
        } else {
            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctx);
            SharedPreferences.Editor editor = prefs.edit();
            editor.putBoolean("toggleButton", tb.isChecked()); 
            editor.commit();        

            // Cancel all alarms
            Intent iWeekly = new Intent(context, ScheduledWeeklyService.class);
            PendingIntent piWeekly = PendingIntent.getBroadcast(context, 0, iWeekly, 0);

            AlarmManager alarmMgrWeekly = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
            try {
                alarmMgrWeekly.cancel(piWeekly);
            } catch (Exception e) {
                Log.e(TAG, "alarm is not cancelled");
            }

            Log.i(TAG, "alarm is turned off");
        }
    }   

现在，一切正常。因此，当我退出应用程序并再次打开它时，上面的代码会再次被触发&它会重新安排报警时间，效果也很好

我试图通过下面的代码来避免警报的重新调度，但它不起作用。非常感谢您的任何想法或帮助。如果我关闭切换按钮并将其打开，则不会安排报警，因为不知何故，它不满足以下条件，也不满足以下条件。有什么线索或想法如何做到这一点吗

boolean weeklyAlarmUp = (PendingIntent.getBroadcast(context, 0, new Intent(context, ScheduledWeeklyService.class), PendingIntent.FLAG_NO_CREATE) != null);

if (!weeklyAlarmUp) {
    Intent iWeekly = new Intent(context, ScheduledWeeklyService.class);
    PendingIntent piWeekly = PendingIntent.getBroadcast(context, 0, iWeekly, 0);

    AlarmManager alarmMgrWeekly = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    alarmMgrWeekly.setRepeating(AlarmManager.RTC_WAKEUP, scheduleTime, Constants.PERIOD_WEEKLY, piWeekly);
}

---

此代码用于检查是否已计划报警：

boolean weeklyAlarmUp = (PendingIntent.getBroadcast(context, 0, new Intent(context,
           ScheduledWeeklyService.class), PendingIntent.FLAG_NO_CREATE) != null);

无法工作，因为您依赖的是现有的

pendingent

。当您取消报警时，您没有取消

挂起内容

，因此它仍然存在，即使报警已被取消

要解决此问题，请确保在取消报警时也取消了

pendingent

，如下所示：

// cancel alarm
alarmMgrWeekly.cancel(piWeekly);
// Cancel PendingIntent
piWeekly.cancel();