It's easy to use Java libraries from Kotlin, to the point that there's nearly a 1:1 syntactic mapping. So in my opinion, yes, you should be able to use Kotlin f

It's easy to use Java libraries from Kotlin, to the point that there's nearly a 1:1 syntactic mapping. So in my opinion, yes, you should be able to use Kotlin from the start. That said, I've never written an Android app. There may be issues with that particular platform.