I have extensive experience with Java in Android development. I developed a price checker application using Java and faced a challenge with memory management, specifically a memory leak caused by not closing the Realm database properly after querying data. This issue resulted in a memory out-of-memory exception on the customer's side. After analyzing the problem, I identified the root cause and implemented a fix by ensuring the Realm instance was closed properly after use. This resolved the memory leak and improved the application's performance. It was a valuable lesson in resource management.