hard20 pts · first answer countspush-notificationsfirebaseandroid

FCM handler skipped in background

You send FCM messages with a "notification" block plus data. When the Android app is in the background, onMessageReceived is not called and your custom handling never runs. Why?

A.FCM is disabled for apps in the backgroundB.Background delivery needs the RECEIVE_BOOT_COMPLETED permission, and without it FCM drops every message for apps that are not in the foregroundC.In the background, the system itself shows messages that have a notification block and skips onMessageReceived; send data-only messages if the app must handle themD.onMessageReceived only works in debug builds

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FCM handler skipped in background

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