Firebase Performance Monitoring for Android Tip #1: Automatic Traces for All Activities
Blog post from Firebase
Firebase Performance Monitoring can automatically collect baseline iOS and Android app metrics, while custom traces and counters provide more detailed measurements for specific app behavior. For Android apps with many activities, developers can avoid manually instrumenting each one by implementing and registering an Application.ActivityLifecycleCallbacks listener that starts a Firebase trace when an activity reaches onStart and stops it at onStop, measuring the period when it is visible to users. A singleton callback manager can store traces by Activity instance, name them from activity class names, and expose the active trace so individual activities can add counters. Registering this listener early through a ContentProvider ensures traces are created before any activity begins, and meaningful counters, such as cache-hit and cache-miss ratios, can help teams identify opportunities to improve user experience.
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