How to track frame metrics for Fragments with Firebase performance?

Question

Firebase Performance monitoring SDK for Android automatically tracks slow rendering and frozen frames for Activity. But there's no such data for Fragment. For example if activity A hosts 3 fragments, then it'll report slow rendering and frozen frames for activity A but there's no way of knowing which fragment is causing that. Is there a way to implement similar screen tracing for fragments?

Answer 1

This is correct that Firebase performance SDK doesn't capture frozen frames automatically(For Fragments) but we can do it manually. Refer to this doc by google: https://firebase.google.com/codelabs/measure-android-view-performance#7

And this ScreenTrace class: https://github.com/FirebaseExtended/codelab-measure-android-view-performance/blob/main/measure-view-performance-start/app/src/main/java/com/google/firebase/example/perfmon/ScreenTrace.java

Now we can use activity's fragment manager to start recording the trace or inside the Application class we can add the fragment lifecycle callback and start the record trace inside onAttach()