.NET 8 MAUI Push Notifications (Android) - Migrating Azure Notification Hub Legacy GCM/FCM protocol over to FCM V1

[tommyw1996]

.NET 8 MAUI Push Notifications (Android) using Azure Notification Hub FCM V1 protocol

Following your tutorials I managed to get push notifications working using Legacy GCM/FCM protocol in .NET 8 MAUI (Android).

Unfortunately we now have to migrate this over to use FCM V1 due to Legacy FCM being out of support from June 2024 (!!)

Since applying the migration changes to the Azure Portal to configure the settings for Google (FCM v1), and registering my device using FCMV1 in my .NET MAUI project. I can no longer get the overridden method OnMessageReceived() to trigger anymore, implemented from Firebase.Messaging.FirebaseMessagingService.

.NET MAUI Changes

Wondering if you have attempted to migrate this at all and if you've had any similar issues?

Any help would be much appreciated! Thanks!

[VladislavAntonyuk]

Probably the best way to check if Microsoft.Azure.NotificationHub is compatible with .NET MAUI. If it does, the registration process will be much simpler.

[tommyw1996]

Finally managed to get it working. It came down to existing installations in my Notification Hub using GCM that I had to delete. And then updating the code in OnNewToken and DeviceInstallationService to now use Microsoft.Azure.NotificationHubs.NotificationHubClient with FcmV1Installation.

[VladislavAntonyuk]

Awesome, I will update the article with the new information

[VladislavAntonyuk]

@tommyw1996 were you able to save new credentials on this page?

I generated Json file on this page

But I get error on save:

[tommyw1996]

Hi @VladislavAntonyuk, yes but I did have some issues with this initially. One thing that got me was when you are entering the private key, you need to ensure you have entered the entire key from the firebase-adminsdk JSON file. The private key should include the text "-----BEGIN PRIVATE KEY-----" and "-----END PRIVATE KEY-----". Hope that helps!

[VladislavAntonyuk]

yes, the key also includes '\n' in the middle and the end of the private key. I copied the whole string from the beginning to the end. Did you make any configuration in Firebase? or maybe modified the private key?

[tommyw1996]

Is your FCM API correctly enabled?

[VladislavAntonyuk]

yes, I will try to create a new project. I have both New and legacy settings enabled

[tommyw1996]

Hmm right, definitely seems odd why you're getting an error! I'll try think of anything else I did but I didn't modify anything to get this working. Another thing I would do is regenerate the admin SDK JSON file, check if the key has updated at all.

[VladislavAntonyuk]

the key is changed. The part of generated JSON:

[VladislavAntonyuk]

Do you also have that \n in your key?

[tommyw1996]

Yes my private key set in Azure Portal begins with "-----BEGIN PRIVATE KEY-----" and ends with "-----END PRIVATE KEY-----\n"

[VladislavAntonyuk]

Ok, that means it may be related only to permissions.

[tommyw1996]

My service account also looks like this in Google Cloud Console

[VladislavAntonyuk]

According to Microsoft nothing special should be required: https://learn.microsoft.com/en-us/azure/notification-hubs/firebase-migration-rest

[tommyw1996]

If your project has just been set up. It might be one of those where you need to wait a little before it can be configured in Azure. Not 100% sure on this but the amount of times I have been stuck with something in Azure not working and it only required me to wait a day to try again and it works. Just another thought!

[VladislavAntonyuk]

The problem was on Azure side, I've just created a new Hub and was able to save changes:

[VladislavAntonyuk]

I will update the article today. Thank you @tommyw1996

[tommyw1996]

Nice! Strange that it wasn't working before but glad it's working now! Let me know if you have any trouble with integrating this with .NET MAUI. I've had FCM v1 working for a good month now with no issues so it's definitely possible. Happy to help.

[plettb]

I'm really struggling to get this working. Does anyone have a repo that could provide a working example? The repo that is referred to in the article (https://github.com/VladislavAntonyuk/WorldExplorer.git) no longer contains notifications. I went back to when it did but can't get it to build. I tried both the commit referenced in the article (8ce130a on 8/13/2023) and the latest I found that contained notifications (550f3152 on 10/11/23).

Using the "DeviceInstallationService.cs" from the article (which is substantially different from anything I actually found in the repo), I get the following errors. Platforms\Android\DeviceInstallationService.cs(10,16,10,37): error CS0103: The name 'GoogleApiAvailability' does not exist in the current context Platforms\Android\DeviceInstallationService.cs(13,16,13,24): error CS0103: The name 'Settings' does not exist in the current context Platforms\Android\DeviceInstallationService.cs(13,79,13,87): error CS0103: The name 'Settings' does not exist in the current context Platforms\Android\DeviceInstallationService.cs(22,33,22,76): error CS1061: 'Task' does not contain a definition for 'GetAwaiter' and no accessible extension method 'GetAwaiter' accepting a first argument of type 'Task' could be found (are you missing a using directive or an assembly reference?) Platforms\Android\DeviceInstallationService.cs(23,36,23,48): error CS0246: The type or namespace name 'Installation' could not be found (are you missing a using directive or an assembly reference?) Platforms\Android\DeviceInstallationService.cs(26,28,26,48): error CS0103: The name 'NotificationPlatform' does not exist in the current context Platforms\Android\DeviceInstallationService.cs(29,26,29,47): error CS0103: The name 'NotificationHubClient' does not exist in the current context I'm obviously missing some NuGets or have incorrect versions, but since I can't get the code from the repo to build either, I can't even seem to track down which packages/versions are the problem.

Any help would be much appreciated, and would definitely warrant a "coffee"! :)

[VladislavAntonyuk]

@plettb I will upload a sample to MauiSamples repo.

[plettb]

FANTASTIC!!! Thank-you VERY MUCH!

[plettb]

I've been struggling with Android notifications off-and-on for a couple of years. Unfortunately I never have enough time to understand it properly, and have never successfully implemented it. I feel like I've gotten close a few times, but this time I'd REALLY like to get it working.

[VladislavAntonyuk]

@plettb pushed changes. MauiNotifications project

[plettb]

Thank-you SO MUCH!!!