For Android devices with direct channel messaging enabled, if the device has not connected to FCM for more than one month, FCM still accepts the message but immediately discards it. Add the following to your app's manifest: A service that extends FirebaseMessagingService. In addition to the delivery reports and notification funnel analysis built into … For use cases such as … Google Analytics is a requirement for FCM's message delivery reporting. Message Types. Using FCM, you can notify a client app that new email or other data is available to sync. With FCM you can send two types of messages to clients : Notification message, sometimes thought of a “display message” Data message, which are … You can send notification messages to drive user re-engagement and retention. FCM provides tools to help you get insight into message delivery. App server sends a data message to FCM server. When the message is received in the FCM app client, you have a short window* to handle the message and post a notification. Edit your app manifest.

As per documentation, Notification Message - FCM automatically displays the message to end-user devices on behalf of the client app. This is required if you want to do any message handling … The data message should include all the data needed for a notification in the payload.