Firebase Cloud Messaging Notification Vibration

Question

Is it possible to make an Android device vibrate when receiving notifications in the background with Firebase Cloud Messaging? From the Syntax Reference I have seen and tested that sound is supported, but no info on vibration. Or is it somehow possible to provide a customized implementation for this notification where I would directly set the vibration?

Answer 1

From what I have tested the format of the FCM Notification message seems to be quite rigid, so for customized notifications, the solution seems to be:

1. Making sure that the payload of the JSON message being sent downstream contains the data parameter but doesn't contain the notification parameter (Sources: Message JSON Syntax, FCM Message Types)
2. Creating the Notification in the implementation of the overridden onMessageReceived(RemoteMessage remoteMessage) from the application's FirebaseMessagingService (Example)