alarmManager.cancel not work

Question

我正在尝试停止重复报警。我已经在网上寻找解决方案，但是我的代码似乎还不错...仍然不能停止警报...这是一些代码（FM是文件写入对象）

public void StartAlarm() {
     Intent intent = new Intent(getApplicationContext(), AlarmReciever.class);
     PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);

     AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
     Calendar alarm = Calendar.getInstance();
     alarm.setTimeInMillis(System.currentTimeMillis());
     alarm.set(Calendar.HOUR_OF_DAY, 15);
     alarm.set(Calendar.MINUTE, 0);
     long alarmCal=alarm.getTimeInMillis();
     if (alarmCal<=new Date().getTime()) {
        alarm.add(Calendar.DAY_OF_MONTH, 1);
     }
     am.setRepeating(AlarmManager.RTC_WAKEUP, alarm.getTimeInMillis(), AlarmManager.INTERVAL_DAY, sender);
     FM.Write("startAlarm()");
     }


 public void StopAlarm() {
        if (isAlarmRunning()) {
             Intent intent = new Intent(getApplicationContext(), AlarmReciever.class);
             PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, 0);
            AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
            alarmManager.cancel(sender);
            FM.Write("alarm canceled");
            isAlarmRunning();
        }
public boolean isAlarmRunning() {
    Intent intentToCheck = new Intent(getApplicationContext(),AlarmReciever.class);
    boolean alarm = PendingIntent.getBroadcast(getApplicationContext(), 0, intentToCheck,
            PendingIntent.FLAG_NO_CREATE) != null;
    FM.Write("alarm = "+alarm);
    if (!alarm) {
        return false;
    }
    else
        return true;
}

谢谢！

Answer 1

在两个函数中都使用此功能

PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

Answer 2

您如何验证警报仍然存在？您需要使用等效的PendingIntent（相同的意图，相同的标志）来停止警报，并且它确实可以工作。顺便说一句，您的isAlarmRunning()方法检查是否存在PendingIntent，这与正在注册的警报不同。即使删除了警报，它也可能返回true。

Answer 3

完全同意Nokolay Elenkov，回答；就像问题注释中提到的那样，用户根据ToggleButton是否处于活动状态来设置PendingIntent。这与警报是否仍然注册有所不同。

并且要同时匹配这两个条件，必须同时取消它们；即取消警报，然后取消PendingIntent。

 Intent intent = new Intent(getApplicationContext(), AlarmReciever.class);
 PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_NO_CREATE);
 myToggleButton.setChecked(pendingIntent != null);

 // Setting the alarm
 AlarmManager alarmManager = (AlarmManager) this.getSystemService(ALARM_SERVICE);
 alarmManager.setRepeating();


 // Canceling the alarm
 alarmManager.cancel(pendingIntent);

 // canceling the pendingIntent
 PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_NO_CREATE).cancel();