警报经理取消不起作用的Android

Question

我创建了一个警报管理器以进行约会提醒及其工作正常。但是，当我想取消警报时，它仍会按时发射。警报取消不起作用。以下是设置和取消警报的代码。谢谢

代码设置警报管理器

AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);    
Intent notificationIntent = new Intent("android.media.action.APPOINTMENT_REMINDER_NOTIFICATION");
notificationIntent.putExtra("APPOINTMENT_TIME", date);
notificationIntent.putExtra("APPOINTMENT_ID", appointment_id);
notificationIntent.addCategory("android.intent.category.DEFAULT");    
PendingIntent broadcast = PendingIntent.getBroadcast(context, 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);    
Calendar cal = Calendar.getInstance();
cal.add(Calendar.SECOND, time_remaining);
alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast);

取消警报

Intent intent = new Intent("android.media.action.APPOINTMENT_REMINDER_NOTIFICATION");
//PendingIntent.getBroadcast(context, 100, intent, PendingIntent.FLAG_UPDATE_CURRENT).cancel();
//Intent intent = new Intent(context, AlarmReceiver.class);
//alarmManager.cancel(PendingIntent.getService(context, 100, intent, 0));    
PendingIntent pIntent = PendingIntent.getBroadcast(context, 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pIntent);
pIntent.cancel();

Answer 1

使用alammanager时要记住的第一件事是 -
在创建并取消警报时必须使用相同的context。

这包括他们的动作，数据，类型，类和类别相同。这 没有比较意图中包含的任何额外数据。

在这种情况下，您可以使用getApplicationContext()使事情变得容易。因此，下面的代码应起作用 -

设置警报 -

AlarmManager alarmManager = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
Intent notificationIntent = new Intent("android.media.action.APPOINTMENT_REMINDER_NOTIFICATION");
notificationIntent.putExtra("APPOINTMENT_TIME", date);
notificationIntent.putExtra("APPOINTMENT_ID", appointment_id);
notificationIntent.addCategory("android.intent.category.DEFAULT");
PendingIntent broadcast = PendingIntent.getBroadcast(getApplicationContext(), 100, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
Calendar cal = Calendar.getInstance();
cal.add(Calendar.SECOND, time_remaining);
alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), broadcast);

取消警报 -

PendingIntent pIntent = PendingIntent.getBroadcast(getApplicationContext(), 100, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(pIntent);

Answer 2

在Brodcast Reciver类中，具有动作名称的新意图。不要传递您的意图

对我来说，它起作用

Answer 3

您需要提供相同的确切意图

private void resetIntentWithAlarm(int time){

    Intent intentAlarm = new Intent(getApplicationContext(), DownloadService.class);
    intentAlarm.putExtra(Your Key, Your stuff to pass here);
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    PendingIntent pendingIntent = PendingIntent.getService(
            getApplicationContext(),
            YOUR_ID,
            intentAlarm,
            PendingIntent.FLAG_UPDATE_CURRENT
    );
if (time != 0) {
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (60L * 1000L * time), (60L * 1000L * time), pendingIntent);
    Log.i(TAG, "Alarm setted on for " + time + " mins.");
}
// if TIME == Zero, cancel alaram
else {
    alarmManager.cancel(pendingIntent);
    Log.i(TAG, "Alarm CANCELED. Time = " + time);
}