如何检测通知是否已被取消？ [英] How to detect if a notification has been dismissed?

问题描述

Android中是否可以检测到用户何时向左滑动通知并将其删除？我正在使用警报管理器设置重复警报，当用户取消通知时，我需要停止重复警报。这是我的代码：

Is there any way in Android to detect when a user swipes a notification to the left and deletes it? I'm using an alarmmanager to set a repeating alert and I need my repeating alert to stop when the notification is cancelled by the user. Here's my code:

设置重复警报：

AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), repeatFrequency, displayIntent);

我的通知代码：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    //Get the notification ID.
    int notifID = getIntent().getExtras().getInt("Reminder_Primary_Key");

    //Get the name of the reminder.
    String reminderName = getIntent().getExtras().getString("Reminder_Name");

    //PendingIntent stores the Activity that should be launched when the user taps the notification.
    Intent i = new Intent(this, ViewLocalRemindersDetail.class);
    i.putExtra("NotifID", notifID);
    i.putExtra("notification_tap", true);

    //Add FLAG_ACTIVITY_NEW_TASK to stop the intent from being launched when the notification is triggered.
    PendingIntent displayIntent = PendingIntent.getActivity(this, notifID, i, Intent.FLAG_ACTIVITY_NEW_TASK);

    NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    Notification notif = new Notification(R.drawable.flag_red_large, reminderName, System.currentTimeMillis());

    CharSequence from = "Here's your reminder:";

    CharSequence message = reminderName;        
    notif.setLatestEventInfo(this, from, message, displayIntent);

    //Pause for 100ms, vibrate for 250ms, pause for 100ms, and vibrate for 500ms.
    notif.defaults |= Notification.DEFAULT_SOUND;
    notif.vibrate = new long[] { 100, 250, 100, 500 };
    nm.notify(notifID, notif);

    //Destroy the activity/notification.
    finish();

}

我知道我需要致电 alarmManager.cancel（displayIntent）以取消我的重复警报。但是，我不知道将此代码放在何处。我只需要在用户点击或关闭通知时才取消重复警报。谢谢您的帮助！

I know I need to call alarmManager.cancel(displayIntent) in order to cancel my repeating alarm. However, I don't understand where to put this code. I need to cancel the repeating alert ONLY when the user has tapped on the notification or dismissed it. Thanks for your help!

推荐答案

我相信 Notification.deleteIntent 。该文档说：

I believe that Notification.deleteIntent is what you are looking for. The doc says:

当用户明确拒绝通知时执行的意图，可以通过全部清除按钮或单独刷去。这可能不应该启动活动，因为其中一些活动将同时发送。

The intent to execute when the notification is explicitly dismissed by the user, either with the "Clear All" button or by swiping it away individually. This probably shouldn't be launching an activity since several of those will be sent at the same time.

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