[Question] CloudMessaging - data-message doesn't receive when app is killed

[ramajd]

[REQUIRED] Please fill in the following fields:

• Pre-built SDK from the website or open-source from this repo: pre-built SDK
• Firebase C++ SDK version: 11.1.0
• Main Firebase Components in concern: Cloud Messaging
• Other Firebase Components in use: _____
• Platform you are using the C++ SDK on: Linux
• Platform you are targeting: Android

[REQUIRED] Please describe the question here:

Adding the firebase-cpp-sdk to an Android Qt application, we receive the data messages when the app is in the foreground or background.

but when the app removes from the recent list, data-messages wont receive anymore.

we also prepared a sample application to reproduce this issue: https://github.com/ramajd/QPushTest

is there any part missed in our implementation?

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[a-maurice]

Hi @ramajd

Sorry for the delay in response. I'm a bit unclear what you mean by not receiving the data-message when killed. When the app isn't running, the message should appear as a notification instead, and if you select that, that should launch the app, and pass in the message.

Looking over the project you linked, everything seemed correct, but I'm not as familiar with Qt, so not sure if there are any extra steps that would require.

[ramajd]

@a-maurice Thank you for your response. let me clarify a bit more.

when server sends a push notification message which doesn't have the notification field (data only message), this message should be received by the app in the background without showing any notification.

as I understand, in above case, the operating system wakes up the application by calling the com.google.firebase.messaging.cpp.ListenerService. I expected that this service triggers an event/signal in the C++ side. but it seems it didn't.

---

as a workaround, I inherited from the com.google.firebase.messaging.cpp.ListenerService and process the incoming data directly in Java native code.

[a-maurice]

Ah, thanks for the detailed explanation, that makes more sense now. I'm not sure what might be missing that is preventing the message from going through, we will need to take some time to look into it. But good to know that you have a workaround in the meantime.