Delete alarm from AlarmManager using cancel() - Android

问题:

I'm trying to create and delete an alarm in two different methods which are both called at different moments in the application logic.

However when I call AlarmManager's cancel() method, the alarm isn't deleted.

Here's my addAlarm() Method :

AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);  Intent intent = new Intent(PROX_ALERT_INTENT); intent.putExtra("ALERT_TIME", alert.date); intent.putExtra("ID_ALERT", alert.idAlert); intent.putExtra("TITLE", alert.title); intent.putExtra("GEO_LOC", alert.isGeoLoc); PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext,         alert.idAlert, intent, PendingIntent.FLAG_CANCEL_CURRENT);  Calendar calendar = Calendar.getInstance(); calendar.setTime(alert.date); alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent); Log.e("ADD ALERT - WithoutGeoLoc - ",alert.toString());

Here's my deleteAlarm() Method :

AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);  Intent intent = new Intent(PROX_ALERT_INTENT); intent.putExtra("ALERT_TIME", alert.date); intent.putExtra("ID_ALERT", alert.idAlert); intent.putExtra("TITLE", alert.title); intent.putExtra("GEO_LOC", alert.isGeoLoc); PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext,         alert.idAlert, intent, PendingIntent.FLAG_CANCEL_CURRENT);  alarmManager.cancel(pendingIntent); Log.e(TAG,"REMOVE ALERT - without GeoLoc"+alert.toString());

Here's my Logcat :

01-23 17:44:07.411: E/ADD ALERT - WithoutGeoLoc -(18789): Alert [latitude=0.0, longitude=0.0, title=bfwu, comments=null, address=null, currency=hrk, idAlert=1, date=Sat Feb 23 17:44:04 CET 2013, isGeoLoc=null] 01-23 17:44:13.032: E/REMOVE ALERT without GeoLoc - (18789): Alert [latitude=0.0, longitude=0.0, title=bfwu, comments=null, address=null, currency=hrk, idAlert=1, date=Sat Feb 23 17:44:04 CET 2013, isGeoLoc=null]

Here's a list of pendingIntents in the AlarmManager

Current Alarm Manager state: Realtime wakeup (now=2013-01-23 17:44:37): RTC_WAKEUP #48: Alarm{2c1d0588 type 0 com.my.app} type=0 when=+364d23h59m33s288ms repeatInterval=0 count=0 operation=PendingIntent{2c0a6cb0: PendingIntentRecord{2c1d04e8 com.my.app  broadcastIntent}} RTC_WAKEUP #47: Alarm{2c2298a0 type 0 com.my.app} type=0 when=+30d23h59m27s360ms repeatInterval=0 count=0 operation=PendingIntent{2c292af8: PendingIntentRecord{2c22a628 com.my.app broadcastIntent}}

A couple notes:

• RTC_WAKEUP #47 is My Original Alarm
• RTC_WAKEUP #48 is a New Alarm that should have overwritten #47 rather than create a new one.

I have compared the two intents (not pendingIntents) from my add and delete methods using Intent's filterEquals() method which returns true ... Yet the alarm is not deleted. What am I doing wrong?

---

UPDATE

Here's my saveAlert() method that calls addAlarm() and deleteAlarm()

private void saveAlert() {     // *** If Modifying Alert => REMOVE OLD ALERT (then add new one)     Intent intent1 = null, intent2 = null;      if (alert.idAlert != null) {         if (alert.isGeoLoc == null || alert.isGeoLoc == false) {             intent2 = ProximityService.removeProximityAlertWithoutGeoLoc(getApplicationContext(), devisesApp.alertsGlobal.getAlertById(alert));         } else {             ProximityService.removeProximityAlert(getApplicationContext(), alert);         }     }     // *** Add Alert     if (alert.isGeoLoc == null || alert.isGeoLoc == false) {         intent1 = ProximityService.addProximityAlertWithoutGeoLoc(getApplicationContext(), alert, devisesApp.alertsGlobal);     } else {         ProximityService.addProximityAlert(getApplicationContext(), alert, devisesApp.alertsGlobal);     }      Log.i(TAG, "[saveAlert] Alert ID : " + alert.idAlert);     devisesApp.alertsGlobal.addById(alert);     Log.i("INTENT EQUALS", intent1.filterEquals(intent2) + ""); // This returns true }

回答1:

Try this flag:

PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, alert.idAlert, intent, PendingIntent.FLAG_UPDATE_CURRENT)  

Instead of:

PendingIntent.FLAG_CANCEL_CURRENT 

Make sure that you use same alert object and mContext.

If you want one global AlarmManager, put the AlarmManager in a static variable (and initialize it only if is null).

回答2:

Cancelling an alarm is a bit confusing. You have to pass the same ID and IntentPending. Here is an example:

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);     }

回答3:

If you want to cancel the alarm manager just put the wright id in pending intent and just call cancel() in alarm manager for that pending intent.

转载请标明出处:Delete alarm from AlarmManager using cancel() - Android

文章来源: Delete alarm from AlarmManager using cancel() - Android