Kotlin on Android. Now official
On May 17, at the Google I/O keynote, the Android team announced first-class support for Kotlin. We believe this is a great step for Kotlin, and fantastic news for Android developers as well as the rest of our community. We’re thrilled with the opportunities this opens up.
For Android developers, Kotlin support is a chance to use a modern and powerful language, helping solve common headaches such as runtime exceptions and source code verbosity. Kotlin is easy to get started with and can be gradually introduced into existing projects, which means that your existing skills and technology investments are preserved.
Quick References:Kotlin Official Blog