How to use Android Support typedef annotations in kotlin?

Edit: In case you miss the comments on the question or this answer, it’s worth noting that the following technique compiles,
but does not create the compile-time validation you would get in
Java (which partially defeats the purpose of doing this). Consider using an enum
class
instead.

It is actually possible to use the @IntDef support annotation by defining your values outside of the annotation class as const vals.

Using your example:

import android.support.annotation.IntDef

public class Test {

    companion object {

         @IntDef(SLOW, NORMAL, FAST)
         @Retention(AnnotationRetention.SOURCE)
         annotation class Speed

         const val SLOW = 0L
         const val NORMAL = 1L
         const val FAST = 2L
    }

    @Speed
    private lateinit var speed: Long

    public fun setSpeed(@Speed speed: Long) {
        this.speed = speed
    }
}

Note that at this point the compiler seems to require the Long type for the @IntDef annotation instead of actual Ints.