在android / Xamarin.Android中单击通知时切换到运行活动

Question

我正在使用NotificationCompat.Builder显示通知。我希望当用户单击通知时，它将切换到正在运行的活动，而不是固定的活动。

假设我有4个活动，我在第2个活动中，向用户显示一些通知，然后移至第4个活动，然后按下主页按钮。现在通知仍然存在。当用户单击该按钮时，它应移至第四个活动。

如何检测到？这是我到目前为止完成的代码。

    var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);

var pendingIntent = PendingIntent.GetActivity(this, MainActivity.NOTIFICATION_ID, intent, PendingIntentFlags.UpdateCurrent);
var notificationBuilder = new NotificationCompat.Builder(this, 0)
                         .SetSmallIcon(Resource.Drawable.Icon)
                         .SetContentTitle(Title)
                         .SetContentText(messageBody)
                          .SetAutoCancel(true)
                          .SetContentIntent(pendingIntent);

var notificationManager = NotificationManagerCompat.From(this);
notificationManager.Notify(MainActivity.NOTIFICATION_ID, notificationBuilder.Build());

Answer 1

我得到了答案，只需要替换PendingIntent。这是完整的代码

var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);

//var pendingIntent = PendingIntent.GetActivity(this, MainActivity.NOTIFICATION_ID, intent, PendingIntentFlags.UpdateCurrent);
var notificationBuilder = new NotificationCompat.Builder(this, 0)
                         .SetSmallIcon(Resource.Drawable.Icon)
                         .SetContentTitle(Title)
                         .SetContentText(messageBody)
                          .SetAutoCancel(true)
                          .SetContentIntent(GetRunningIntent());

var notificationManager = NotificationManagerCompat.From(this);
notificationManager.Notify(MainActivity.NOTIFICATION_ID, notificationBuilder.Build());



 PendingIntent GetRunningIntent()
            {
                var intent = PackageManager.GetLaunchIntentForPackage(PackageName)
                    .SetPackage(null)
                    .SetFlags(ActivityFlags.BroughtToFront);

                PendingIntent pendingIntent = PendingIntent.GetActivity(this, MainActivity.NOTIFICATION_ID, intent, 0);
                return pendingIntent;
            }