Android Kotlin onItemSelectedListener for spinner not working

Question

I have a spinner with some items (strings). I want to add the selected items to a list. I read online that I should use the onItemSelectedListenerrather than the

Answer 1

Add extension function

fun Spinner.selected(action: () -> Unit) {
    this.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {
        override fun onNothingSelected(parent: AdapterView<*>?) {}
        override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
            action()
        }
    }
}

simple use

spinner.selected {
    // todo something
}