어댑터 만드는 기본 툴 저장하고 꺼내쓰기

class ItemAdapter(private val mItems: MutableList<SaleItem>) :
    RecyclerView.Adapter<ItemAdapter.Holder>() {

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

    override fun onBindViewHolder(holder: Holder, position: Int) {

    }

    override fun getItemId(position: Int): Long {
        return position.toLong()
    }

    override fun getItemCount(): Int {
        return mItems.size
    }

    inner class Holder(binding: ItemBinding) : RecyclerView.ViewHolder(binding.root) {
        val itemImageView = binding.iconItem
    }
}