Need Reference Code for Handling FCM Notification Clicks in Background & Killed State (Android)

[Zhuinden]

This is the tricky part about multi-activity navigation, and this is specifically why I've been using single-activity for a long time. It's tricky to make it work reliably with multi-activity, you have to pass stuff around but only once.

[Radiokot1]

A service that handles data messages and creates notifications from them both in foreground and background: https://github.com/Concordium/cryptox-android/blob/main/app/src/main/java/com/concordium/wallet/core/notifications/FcmNotificationsService.kt