On May 17th 2017, Google announced that it's making Kotlin, a statically typed programming language for the Java Virtual Machine, a first-class language to write Android apps.
The next version of Android Studio (3.0, current one is 2.3.3) will support Kotlin out of the box. Google will put its effort in the future of Kotlin.
It is important to note that this is only an additional language, not a replacement for existing Java and C++ support (for now).