Example implementation of MaterialSpinnerAdapter

ExampleSpinnerArrayAdapter.kt

class ExampleSpinnerArrayAdapter(context: Context, objects: List<ExampleItem>) : MaterialSpinnerAdapter<ExampleItem>(context, objects) {
    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
        // implement viewholder pattern
        val view: View
        // automatically generated binding class
        val binding: ExampleItemBinding
        if (convertView == null) {
            // view is new - we have to inflate the binding object and set it as a tag
            binding = ExampleItemBinding.inflate(inflater, parent, false)
            view = binding.root
            view.tag = binding
        } else {
            // reusing existing view - retrieve binding from the tag
            view = convertView
            binding = view.tag as ExampleItemBinding
        }
        // update UI - set the binding variables
        binding.item = getItem(position)
        binding.selected = position == selectedItemPosition
        return view
    }
}