7 things you probably don’t know about Kotlin #3

CustomButton.kt

// Using in Java
CustomButton button = new CustomButton(context);
button.setVisibility(CustomButton.Companion.getGONE());

// Using in Kotlin
val button = CustomButton(context)
button.visibility = CustomButton.VISIBLE

class CustomButton(context: Context?) : View(context) {
    companion object {
        // Visibility
        val GONE = 1
        val VISIBLE = 2
        val INVISIBLE = 3
    }
}