使用 cancel() 从 AlarmManager 删除警报 - Android [英] Delete alarm from AlarmManager using cancel() - Android

问题描述

我正在尝试使用两种不同的方法创建和删除警报，这两种方法都在应用程序逻辑的不同时刻调用.

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

然而，当我调用 AlarmManager 的 cancel() 方法时，警报并没有被删除.

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

这是我的 addAlarm() 方法:

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());

这是我的 deleteAlarm() 方法:

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());

这是我的 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]

这是AlarmManager中的pendingIntent列表

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}}

一些注意事项:

• RTC_WAKEUP #47 是我原来的闹钟
• RTC_WAKEUP #48 是一个新闹钟，应该覆盖 #47 而不是创建一个新闹钟.

• 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.

我使用返回 true 的 Intent 的 filterEquals() 方法比较了我的添加和删除方法中的两个意图(不是pendingIntents)......但警报不是删除.我做错了什么?

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?

更新

这是我的 saveAlert() 方法，它调用 addAlarm() 和 deleteAlarm()

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
}

推荐答案

试试这个标志:

PendingIntent.FLAG_UPDATE_CURRENT

代替:

PendingIntent.FLAG_CANCEL_CURRENT 

因此 PendingIntent 将如下所示:

So the PendingIntent will look like this:

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

(确保您使用相同的alert 对象和mContext！)

(Make sure that you use same alert object and mContext!)

旁注:如果你想要一个全局的 AlarmManager，把 AlarmManager 放在一个静态变量中(并且只有当它是 null 时才初始化它).

A side note: If you want one global AlarmManager, put the AlarmManager in a static variable (and initialize it only if it's null).

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