This is an example for issue

In-App Messaging - Message is not showing!

“Removing display event listener”

I suppose, there is a problem with calling FirebaseInAppMessaging.clearDisplayListener() in FirebaseInAppMessagingDisplay.onActivityDestroyed without checking which activity has destroyed (current or previous). As a result, the app can skip messages.

Case:

0. Get example app's Instance ID
1. Close example app
2. send test in-app message from firebase console
3. open app (open FirstActivity)
4. FirstActivity open SecondActivity
5. FirstActivity has finished.
6. SecondActivity still opened.
7. The message was received but not showing.

Logs:

2019-12-24 13:01:07.241 17432-17432/com.master8.experimentalproject D/FIAM.Display: Created activity: com.master8.experimentalproject.FirstActivity
2019-12-24 13:01:07.292 17432-17432/com.master8.experimentalproject D/FIAM.Display: Started activity: com.master8.experimentalproject.FirstActivity
2019-12-24 13:01:07.292 17432-17432/com.master8.experimentalproject I/FIAM.Headless: Setting display event listener
2019-12-24 13:01:07.295 17432-17432/com.master8.experimentalproject I/FIAM.Headless: went foreground
2019-12-24 13:01:07.295 17432-17432/com.master8.experimentalproject D/FIAM.Headless: Event Triggered: ON_FOREGROUND
2019-12-24 13:01:07.295 17432-17432/com.master8.experimentalproject D/FIAM.Display: Resumed activity: com.master8.experimentalproject.FirstActivity
2019-12-24 13:01:07.297 17432-17533/com.master8.experimentalproject I/FIAM.Headless: Forcing fetch from service rather than cache. Test Device: true | App Fresh Install: true
2019-12-24 13:01:07.297 17432-17533/com.master8.experimentalproject I/FIAM.Headless: Recoverable exception while reading cache: /data/user/0/com.master8.experimentalproject/files/fiam_impressions_store_file (No such file or directory)
2019-12-24 13:01:07.300 17432-17533/com.master8.experimentalproject I/FIAM.Headless: Fetching campaigns from service.
2019-12-24 13:01:07.322 17432-17432/com.master8.experimentalproject I/FIAM.Headless: Removing display event listener
2019-12-24 13:01:07.322 17432-17432/com.master8.experimentalproject D/FIAM.Display: Pausing activity: com.master8.experimentalproject.FirstActivity
2019-12-24 13:01:07.352 17432-17432/com.master8.experimentalproject D/FIAM.Display: Created activity: com.master8.experimentalproject.SecondActivity
2019-12-24 13:01:07.389 17432-17432/com.master8.experimentalproject D/FIAM.Display: Started activity: com.master8.experimentalproject.SecondActivity
2019-12-24 13:01:07.389 17432-17432/com.master8.experimentalproject I/FIAM.Headless: Setting display event listener
2019-12-24 13:01:07.392 17432-17432/com.master8.experimentalproject D/FIAM.Display: Resumed activity: com.master8.experimentalproject.SecondActivity
2019-12-24 13:01:07.524 17432-17432/com.master8.experimentalproject D/FIAM.Display: Stopped activity: com.master8.experimentalproject.FirstActivity
2019-12-24 13:01:07.526 17432-17432/com.master8.experimentalproject I/FIAM.Headless: Removing display event listener
2019-12-24 13:01:07.526 17432-17432/com.master8.experimentalproject D/FIAM.Display: Destroyed activity: com.master8.experimentalproject.FirstActivity
2019-12-24 13:01:07.681 17432-17533/com.master8.experimentalproject I/FIAM.Headless: Successfully fetched 1 messages from backend
2019-12-24 13:01:07.682 17432-17533/com.master8.experimentalproject D/FIAM.Headless: Updating contextual triggers for the following analytics events: []
2019-12-24 13:01:07.690 17432-17533/com.master8.experimentalproject D/FIAM.Headless: Decoding message: # com.google.firebase.inappmessaging.MessagesProto$Content@533ba749
    banner {
      background_hex_color: "#3ca9ff"
      body {
        hex_color: "#ffffff"
        text: "\320\242\320\265\320\272\321\201\321\202 \321\201\320\276\320\276\320\261\321\211\320\265\320\275\320\270\321\217"
      }
      title {
        hex_color: "#ffffff"
        text: "\320\227\320\260\320\263\320\276\320\273\320\276\320\262\320\276\320\272"
      }
    }