[firebase_messaging] Why not use FirebaseMessagingService#onMessageReceived for receiving messages?

[yorihutagalung]

Hello everyone,

Does anyone know why firebase_messaging (Android) uses BroadcastReceiver instead of FirebaseMessagingService#onMessageReceived to receive messages?

According to the Android official documentation, it states that we should use FirebaseMessagingService, and I couldn’t find any reference to the BroadcastReceiver approach.

My company is currently investigating a low notification receive rate on our flutter app compared to our native app, even though both use FCM to send notifications (via the same backend system). After reviewing the native implementation, we noticed this discrepancy and are wondering if this could be the reason why our flutter app has a lower receive rate.

Any explanation would be greatly appreciated. Thank you!