How to cancel this repeating alarm?

问题

I\'m writing something like a reminder for users. Users will set reminders for their events, when the time comes, a repeating alarm will be set to trigger a status bar notification. But the alarm seems non-stop after I selected the notification or cleared the notification. I am not sure where to cancel this repeating alarm. Below are some of the codes: Set up the repeating alarm in my main activity

alarmTime = Calendar.getInstance();
Intent intent = new Intent(this, AlarmReceive.class);
PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

alarmTime.add(Calendar.MINUTE,offset_time);

//Schedule the alarm
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, alarmTime.getTimeInMillis(), 30 * 1000, sender);

In my OnReceive method, I just display the notification in status bar and set the flag as FLAG_AUTO_CANCEL

manager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);

// Set the icon, scrolling text and timestamp
Notification notification = new Notification(R.drawable.medical, text, System.currentTimeMillis());

PendingIntent contentIntent = PendingIntent.getActivity(context, 0, i, 0);

notification.flags = Notification.FLAG_AUTO_CANCEL;

manager.notify(R.string.service_text, notification);

How can I stop the alarm when the user selects the notification or clears it?

回答1:

Call cancel() on AlarmManager with an equivalent PendingIntent to the one you used with setRepeating():

Intent intent = new Intent(this, AlarmReceive.class);
PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

alarmManager.cancel(sender);

回答2:

I tried various methods and couldnt get it to work, so I decided to do a dirty trick. When I want to cancel my repeating alarm, I use the same method that created my alarm (and hence replacing the old one) and then cancel it right away. With this method if the boolean variable is set to true it creates an alarm ow it replaces and then cancels the replacement which has the same id:

static void CancelRepeatingAlarm(Context context, boolean creating){
    //if it already exists, then replace it with this one
    Intent alertIntent = new Intent(context, AlertReceiver.class);
    PendingIntent timerAlarmIntent = PendingIntent
            .getBroadcast(context, 100, alertIntent,PendingIntent.FLAG_CANCEL_CURRENT); 
    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    if (creating){
        alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), INTERVAL, timerAlarmIntent);
    }else{
        alarmManager.cancel(timerAlarmIntent);
    }

回答3:

In your MainActivity, set the alarm time. If you're going to use multiple alarms, use SharedPreferences to store their respective IDs. Here is the code:

PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, _id,intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager = (AlarmManager) getSystemService(Activity.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),
            pendingIntent);

public static Context getContext() {
    return mContext;
}
mContext=mainactivity.this;

In your second Activity use same ID from SharedPreferences. In my code, I get the ID from the ArrayList, Alarm_id. Last, you can use the MainActivity context here with MainActivity.getContext(). Here is the code:

AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intentAlarm = new Intent(AlarmListviewActivity.this,
        MainActivity.class);
PendingIntent morningIntent = PendingIntent.getBroadcast(MainActivity.getContext(), Alarm_id.get(positon),
        intentAlarm, PendingIntent.FLAG_CANCEL_CURRENT);

alarmManager.cancel(morningIntent);
morningIntent.cancel();

来源：https://stackoverflow.com/questions/3330522/how-to-cancel-this-repeating-alarm

标签

android

alarm