Is Android written in Kotlin?

Kotlin is officially supported by Google for Android development , meaning that Android documentation and tooling is designed with Kotlin in mind. Certain Android APIs, like Android KTX, are Kotlin-specific, but most are written in Java and can be called from either Java or Kotlin.

Kotlin is the preferred language for Android development in 2021 . Both Java and Kotlin can be used to build performant, useful applications, but Google’s libraries, tooling, documentation, and learning resources continue to embrace a Kotlin-first approach; making it the better language for Android today.

Kotlin is officially supported by Google for Android development , meaning that Android documentation and tooling is designed with Kotlin in mind. Certain Android APIs, like Android KTX, are Kotlin-specific, but most are written in Java and can be called from either Java or Kotlin.