Binding adapters for MaterialSpinner

MaterialSpinnerBindingAdapters.kt

@BindingAdapter("selectedPosition")
fun setSelectedPosition(view: MaterialSpinner, position: Int) {
    if (view.selectedPosition != position) {
        view.selectedPosition = position
    }
}

@InverseBindingAdapter(attribute = "selectedPosition")
fun getSelectedPosition(view: MaterialSpinner): Int {
    return view.selectedPosition
}

@BindingAdapter("selectedPositionAttrChanged")
fun listenToSelectedPosition(view: MaterialSpinner, listener: InverseBindingListener) {
    view.setOnItemClickListener { _, _, _, _ -> listener.onChange() }
}