Xamarin Android 从前台通知启动应用程序

Question

这是我第一次发帖，所以如果我错过了什么，请告诉我。

我正在开发一个一切正常的前台服务。 我的问题是如何从前台服务通知启动应用程序？

一是应用程序关闭，前台服务仍在运行。 有没有办法让用户拉下抽屉并点击正在运行的服务并启动应用程序？

我希望有人能帮帮忙。 这是我的服务代码。

   private void startForegroundService()
    {
        try
        {
            var notifcationManager = GetSystemService(Context.NotificationService) as NotificationManager;
            var intent = new Intent(this, typeof(ProteoForegroundService));
            PendingIntent pendingIntent = PendingIntent.GetActivity(this, PENDING_INTENT_ID, intent, PendingIntentFlags.OneShot);

          if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
            {
                createNotificationChannel(notifcationManager);
            }

            var notification = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
            notification.SetAutoCancel(false);
            notification.SetOngoing(true);
            notification.SetSmallIcon(Resource.Drawable.Icon);
            notification.SetContentTitle("Proteo Mobile");
            notification.SetContentText("Proteo Mobile is running");
            notification.SetContentIntent(pendingIntent);
            StartForeground(NOTIFICATION_ID, notification.Build());
        }
        catch (Exception ex)
        {
            Crashes.TrackError(ex, new Dictionary<string, string> { { "ProteoForegroundService.cs", "startForegroundService()" } });
        }
    }

    private void createNotificationChannel(NotificationManager notificationMnaManager)
    {
        try
        {
            var channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME,
                NotificationImportance.Low);
            notificationMnaManager.CreateNotificationChannel(channel);
        }
        catch (Exception ex)
        {
            Crashes.TrackError(ex, new Dictionary<string, string> { { "ProteoForegroundService.cs", "createNotificationChannel()" } });
        }

    }

    public override IBinder OnBind(Intent intent)
    {
        return null;
    }

    public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId)
    {
        startForegroundService();

        return StartCommandResult.NotSticky;


    }

Answer 1

notification.SetContentIntent 方法是设置用户点击正在运行的服务时要执行的操作的具体方法，而 PendingIntent.GetActivity 方法应该获得一个活动。 如：

private void startForegroundService()
{
    try
    {
        var notifcationManager = GetSystemService(Context.NotificationService) as NotificationManager;
        var intent = new Intent(this, typeof(MainActivity));
        PendingIntent pendingIntent = PendingIntent.GetActivity(this, PENDING_INTENT_ID, intent, PendingIntentFlags.OneShot);

      if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
        {
            createNotificationChannel(notifcationManager);
        }

        var notification = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
        notification.SetAutoCancel(false);
        notification.SetOngoing(true);
        notification.SetSmallIcon(Resource.Drawable.Icon);
        notification.SetContentTitle("Proteo Mobile");
        notification.SetContentText("Proteo Mobile is running");
        notification.SetContentIntent(pendingIntent);
        StartForeground(NOTIFICATION_ID, notification.Build());
    }
    catch (Exception ex)
    {
        Crashes.TrackError(ex, new Dictionary<string, string> { { "ProteoForegroundService.cs", "startForegroundService()" } });
    }
}