I am using Firebase Cloud Messaging and I have my own class that extends FirebaseMessagingService.
My activities order are as follows:
SplashActivity -> MainActivity -> DetailsActivity . When the app is in the MainActivity and I send a message using the Firebase Console everything is fine it opens up the Dialog I wanted it to open. Also when I am in MainActivity and I send a message that is meant to open DetailsActivity everything is fine.
However when the app is in the background and I send the message, the Notification does not show as intended and when I click it it opens SplashActivity first even though the defined Intent to be opened using PendingIntent is MainActivity. How can I go about these two problems?
In my custom FirebaseMessagingService class I have defined the Intent to have the following flags Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP and my PendingIntent to have the following flags PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_ONE_SHOT but it still does not work.
Check if method onMessageReceived in your FirebaseMessagingServise is properly called in background, so you can setup what you need.
I had to send data message type instead of notification, because when you send type notification then method OnMessageReceived is not called in background and firebase handles push notification instead of you. Be aware you cannot even combine type notification and data message.
More about data message you can find here https://firebase.google.com/docs/cloud-messaging/concept-options