adapter.kt

class MyAdapter : ListAdapter<String, MyAdapter.ViewHolder>(DiffCallBack) {

    class ViewHolder(private val binding: AdapterItemBinding) :
        RecyclerView.ViewHolder(binding.root) {
        fun bind(text: String) {
            binding.textView.text = text
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val binding = AdapterItemBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        return ViewHolder(binding)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bind(getItem(position))
    }

    object DiffCallBack : DiffUtil.ItemCallback<String>() {
        override fun areItemsTheSame(oldItem: String, newItem: String): Boolean {
            return oldItem == newItem
        }

        override fun areContentsTheSame(oldItem: String, newItem: String): Boolean {
            return oldItem == newItem
        }
    }
}