Execute "onMessageReceived" on background

[mickjol]

[READ] Step 1: Are you in the right place?

• I like to send a "data message" throw this nuget (no notification), so the "onMessageReceived" method was call on android in even in background.
• Actually, I use HTTP legacy URI : https://fcm.googleapis.com/fcm/send and I'm able to send "data message" and "notification message"
• I try to use "HTTP v1" instead, but I can't send "data message", I always receive a "notification message"

[REQUIRED] Step 2: Describe your environment

• Operating System version: ubuntu 22.04
• Firebase SDK version: 2.3.0
• Firebase Product: messaging
• .NET version: net6.0
• OS: linux

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

Send a message with :

var message = new Message()
{
    Token = myToken,
    Notification = new Notification
    {
        Body = notification.Message.GetLanguage(device.DeviceLanguage),
        Title = notification.Title.GetLanguage(device.DeviceLanguage),
    },
    Android = new AndroidConfig
    {
        TimeToLive = TimeSpan.FromHours(1),
        Priority = Priority.High,
        Notification = new AndroidNotification
        {
            ChannelId = GetAndroidChannelId("alertChannel", soundName)
        }
    },
    Data = new Dictionary<string, string>() { }
};
var fcmResponse = await FirebaseMessaging.DefaultInstance.SendAsync(message);

I receive a "notification message" :)

var message = new Message()
{
    Token = myToken,
    Android = new AndroidConfig
    {
        TimeToLive = TimeSpan.FromHours(1),
        Priority = Priority.High,
        Notification = new AndroidNotification
        {
            ChannelId = GetAndroidChannelId("alertChannel", soundName)
        }
    },
    Data = new Dictionary<string, string>() { }
};
var fcmResponse = await FirebaseMessaging.DefaultInstance.SendAsync(message);

I receive a "notification message" not a "data message" :(

I aslo try to force the Notification property as null. But I had the same result

var message = new Message()
{
    Token = myToken,
    Notification = null,
...

There is something I can do ?

[iamkinetic]

@chong-shao Is there any follow up about this problem?

[philipperobertgh]

Same problem for me. Is there any solution available ?

[Josbleuet]

It seams that I have the same issue, any news ?

[gautambjain]

I am having the same issue. The data message doesn't reach onMessageReceived if the android app is in the background. Many have suggested a solution here: https://stackoverflow.com/questions/48451761/firebase-message-with-high-priority-not-waking-device-from-doze-android-6

The solution is to add priority at both Message level and at AndroidOptions level.

{
    "priority": "high", // legacy HTTP protocol (this can also be set to 10)
    "android": {
        "priority": "high" // HTTP v1 protocol
    }
}

Can we have a workaround or a fix for this? It is very critical issue.

[gautambjain]

{
    "priority": "high", // legacy HTTP protocol (this can also be set to 10)
    "android": {
        "priority": "high" // HTTP v1 protocol
    }
}

I modified the code to have "priority" as part of Message object, but this didn't work. Received error from the server that the json payload is invalid.