SpinnerExtension.kt

inline fun Spinner.onItemSelectedListenerCustom(crossinline changed: (AdapterView<*>?, View?, Int, Long) -> Unit): AdapterView.OnItemSelectedListener {
    val listener = object : AdapterView.OnItemSelectedListener {
        override fun onItemSelected(
            parent: AdapterView<*>?,
            view: View?,
            position: Int,
            id: Long
        ) {
            changed.invoke(parent, view, position, id)
        }

        override fun onNothingSelected(parent: AdapterView<*>?) {}
    }
    this.onItemSelectedListener = listener
    return listener
}