Meta has been at work to port their Android codebase from Java to Kotlin. In the process, they have learned a number of lessons of general interest and developed a few useful approaches, explains ...

After Kotlin was approved by Google for Android development, more than 50% of Android developers switched to it from Java, and also up to 20% of Java server-side developers.

Kotlin competes with Java to be a top programming language for mobile applications on Android. The top 3 stay steady.