Performance optimization is a crucial element of mobile application development. In one instance, I enhanced the performance of an Android system by addressing Application Not Responding (ANR) issues and memory leaks.

Our application frequently encountered ANR errors due to long-running operations being executed on the main thread. To resolve this, I shifted all I/O operations, such as API calls and database reads/writes, to background threads using Kotlin Coroutines. This adjustment prevented the main thread from being blocked and significantly improved the app's responsiveness.

Additionally, I addressed memory leaks by ensuring that services and background tasks were not tightly coupled to activities. This involved using weak references and carefully managing the lifecycle of objects to ensure they were properly deallocated when no longer needed. I also utilized Android Studio's profiling tools to monitor memory usage and identify objects that were not being garbage collected. This process allowed us to pinpoint and resolve issues where objects were holding onto references longer than necessary.

By implementing these optimizations, we greatly enhanced the app's performance and stability, resulting in a smoother user experience and fewer crashes.