"Today, our Android apps for Facebook ... than writing new code using Kotlin and leaving most of the existing code in Java (the second approach is how the Linux kernel project and the Android ...

Kotlin offers big advantages over Java for JVM and Android development, and plays nicely with Java in the same projects ... JavaScript ES5.1 and native code (using LLVM) for a number of processors ...

Non-game Android apps are normally written in Java, but a group inside Google is experimenting with a whole new way of writing Android apps using Dart, Google's in-house Web development language.