Android Firebase cloud messaging handling multiple notification

Question

I'm using new Firebase Cloud Messaging and sending messages from server including both notification and dat. I have following questions about that:

onMessageReceived is not called when app is in background and notification created so how i can detect that notification and get its data without waiting for user to click and get data from intent.
I have set "click_action" in notification to launch activity when notification called but it will recreate activity even if it is already running how avoid that?

Same problems for me. I'am unable to get notification data without waiting for user to click(if activity is open). — Jitesh Prajapati, Aug 06 '16 at 09:35
If an app is in the background and received a *notification* message, that message is not delivered to the app. Instead Firebase displays a message in the notification tray, which starts the app when clicked. See http://stackoverflow.com/questions/37809885/firebase-push-notifications-update-db/37843845#37843845 — Frank van Puffelen, Aug 06 '16 at 15:30

score 0 · Answer 1 · answered Aug 06 '16 at 12:32

You can use intent flags to get rid of that second problem, you mentioned. Refer to this link for the available flags: https://developer.android.com/reference/android/content/Intent.html

Then, you can use those flags like this,

Intent intent = new Intent(context, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);

when starting an activity.

And for the third problem you listed, you can assign pending intents to the notification which will get fired after clicked.

Intent intent = new Intent(this, FNotiReceiver.class);
intent.setAction("com.nepal.application.pendingIntent");
intent.putExtra("Name", "Data/Value");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, notification_ID,
            intent, PendingIntent.FLAG_UPDATE_CURRENT);

and to remove the notification after clicking it, you can use:

NotificationManager notifManager= (NotificationManager)  context.getSystemService(Context.NOTIFICATION_SERVICE);
notifManager.cancel(notification_ID);

Sorry I don't have the exact answer to your 1st issue, but I think creating a background service will help.

score -1 · Answer 2 · answered Aug 06 '16 at 09:35

Firebase notification handle by,

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    // TODO(developer): Handle FCM messages here.
            Log.d(TAG, "From: " + remoteMessage.getFrom());

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Log.d(TAG, "Message data payload: " + remoteMessage.getData());
    }

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
    }

    // Also if you intend on generating your own notifications as a result of a received FCM
    // message, here is where that should be initiated. See sendNotification method below.
}

For more details https://firebase.google.com/docs/notifications/android/console-device

Android Firebase cloud messaging handling multiple notification

2 Answers2