Push notifications on Xamarin

Maria_Regil · February 4, 2021, 1:27pm

@Nikita_Fedorishchev
I will test again, but the previous times the table remained empty.

Steps:

start app
I see the device in the table
in foreground send notification
the app receive the notificaction
go to background
send notification
the device shows the notification and click to open the app
close the app
send notification
the device shows the notification and click to open the app ( i think that uses a new token and register the device again)
send another notification
the app don’t show nothing and the table is empty

thanks for your support

Maria

Nikita_Fedorishchev · February 4, 2021, 1:29pm

@Maria_Regil, I will check this scenario. Please tell me your result, too.

Maria_Regil · February 4, 2021, 1:32pm

@Nikita_Fedorishchev , the same result, the table is empty, it seems that remove the device when i send the notification

Nikita_Fedorishchev · February 4, 2021, 2:04pm

@Maria_Regil, we are working on the problem, I will let you know when the results are.
One more question. When you specify expiration time, records are not deleted?

Best regards, Nikita.

Maria_Regil · February 4, 2021, 2:45pm

I haven’t tried it yet, I’ll try it and let you know.

Nikita_Fedorishchev · February 5, 2021, 5:45pm

Hello, @Maria_Regil .

We were unable to reproduce your problem. Could you provide a minimal reproducible example?

Regards, Nikita.

Maria_Regil · February 8, 2021, 8:34am

Hi @Nikita_Fedorishchev
I tried registering the device with expiration date and the same thing happened. So I have changed the initialization of firebase so that in debug it does not generate the token again and it seems that this way it works.

One thing that has caught my attention is that the Device ID is different, it changes when changing the token, should it be so?
And moving on to another topic, in the notifications in the title I see the name of the application, not the one I put in the “Title” field during the creation of the notification.

Thank you very much for your support
Maria

Nikita_Fedorishchev · February 8, 2021, 7:14pm

Hi, @Maria_Regil, the bug with DeviceId will be fixed in the next SDK update.
Thank you for your feedback.

As for the “Title”, you may have configured the Push Notifications incorrectly in the client application.
As far as I understand, you are using the following logic to receive Push notifications:

github.com

CrossGeeks/PushNotificationPlugin/blob/master/docs/GettingStarted.md

## Starting with Android

### Android Configuration

First, make sure you setup everthing on Firebase portal

Add this permission:

```xml
<uses-permission android:name="android.permission.INTERNET" />
```

Add google-services.json to Android project. Make sure build action is GoogleServicesJson

![ADD JSON](https://github.com/CrossGeeks/FirebasePushNotificationPlugin/blob/master/images/android-googleservices-json.png?raw=true)

Must compile against 26+ as plugin is using API 26 specific things. Here is a great breakdown: http://redth.codes/such-android-api-levels-much-confuse-wow/ (Android project must be compiled using 9.0+ target framework)

### Android Initialization

This file has been truncated. show original

Pay attention to the section Android Initialization.

Best regards, Nikita.

Maria_Regil · February 9, 2021, 10:11am

Hi @Nikita_Fedorishchev ,
I have been checking the Firebase configuration and it is correct.
I am using the default PushNotificationhandle in the PushnotificationManager initialization and I have tried sending a push notification from Firebase and it arrives correctly with the title in place.

the first notification is from backendless (10 min) and the second is from Firebase (1min).

Thank you
Maria

Nikita_Fedorishchev · February 9, 2021, 11:39am

@Maria_Regil, you can also independently process the data that comes with push notification. Here’s an example of how to do this:

  var values = JsonConvert.DeserializeObject<Dictionary<String, String>>( (String) notif.Data[ "android_immediate_push" ] );
  NotificationCompat.Builder builder = new NotificationCompat.Builder( this, "default" )
                                                             .SetContentTitle( values["contentTitle"] )
                                                             .SetContentText( (String) notif.Data["message"] )
                                                             .SetSmallIcon( Resource.Drawable.ic_mtrl_checked_circle );

  Notification notification = builder.Build();
  NotificationManager manager = GetSystemService( Context.NotificationService ) as NotificationManager;
  const int notificationId = 0;
  manager.Notify( notificationId, notification );

This is a test case (data processing variant), modify the code for your purposes.

Regards, Nikita.

Maria_Regil · February 9, 2021, 2:12pm

Hi @Nikita_Fedorishchev,
I see what you say, but this way the plugin does not recognize the new notification, and also in the case of having the app in the background it duplicates the notification.
Looking at the plugin info:
“If NotificationContentTitleKey not set will look for title key value in the notification payload to set the title. If no title key present will use the application name as the notification title.”

but unfortunately in the payload of the backendkess notification there is no “title” field and the “contentTitle” field is inside “android_immediate_push”, so the plugin doesn’t find it.

github.com

CrossGeeks/PushNotificationPlugin/blob/master/docs/AndroidCustomization.md

## Android Specific Customization

You can set the activity to be launched when you tap on the notification on Android project by setting **PushNotificationManager.NotificationActivityType**

Usage sample:

```csharp
PushNotificationManager.NotificationActivityType = typeof(MainActivity);
```

**Note: Uses application main launcher activity if the above is not set.**

You can also set the flags for launching this activity with **PushNotificationManager.NotificationActivityFlags** by default is set to:

```csharp
PushNotificationManager.NotificationActivityFlags = ActivityFlags.ClearTop | ActivityFlags.SingleTop
```

### Static customization properties

This file has been truncated. show original

thanks
Maria

Nikita_Fedorishchev · February 9, 2021, 2:57pm

@Maria_Regil, alternatively, you can not use PushNotificationManager.Initialize(), then notifications will not be duplicated. and write a method that will process the data.
I checked this just now.

Maria_Regil · February 17, 2021, 9:41am

Hi @Nikita_Fedorishchev ,
I’ve been with another project, sorry for the delay.
You say not to use the initialization for the plugin, but then how do I collect the token?
To register in Backendless I need the token, isn’t it?

although in the documentation there is a different function to register the device:

I don’t know if I am doing it correctly

Maria

Nikita_Fedorishchev · February 17, 2021, 2:44pm

Hello, @Maria_Regil .

I get the token using this method (no initialization in App.Android):

   CrossPushNotification.Current.OnTokenRefresh + = (s, p) =>
   {
     System.Diagnostics.Debug.WriteLine ($ "TOKEN REC: {p.Token}");
     Backendless.Messaging.RegisterDevice (CrossPushNotification.Current.Token);
   };

Unfortunately, the documentation for implementing push notifications for .net has not yet been described.

Regards, Nikita.

Maria_Regil · February 17, 2021, 2:46pm

Ok, thank you, I will try it

Maria

Maria_Regil · February 17, 2021, 5:33pm

Hi @Nikita_Fedorishchev ,
Finally I solved it in a different way.
Instead of launching another notification from CrossPushNotification.Current.OnNotificationReceived what I have done is to add the contentTitle that is in “android_inmediate_push” to the payload of the notification.

` CrossPushNotification.Current.OnNotificationReceived += (s, p) =>
    {
            System.Diagnostics.Debug.WriteLine("NOTIFICATION RECEIVED", (String)p.Data["android_immediate_push"]);
           
            var values = JsonConvert.DeserializeObject<Dictionary<String, String>>((String)p.Data["android_immediate_push"]);
            p.Data.Add("title", values["contentTitle"]);
       
    };`

This way it shows me the correct title in the notification.

Thank you very much for your help
Maria

Nikita_Fedorishchev · February 17, 2021, 6:08pm

@Maria_Regil, awesome! I think this is a great solution and thank you. We will try to describe the connection of push notifications in .NET as soon as possible.

Best regards, Nikita.