Recyclerview adapter with the header-footer pattern applied

MainActivity.kt

    inner class ItemAdapter(private val list: MutableList<String>) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
        private val itemHeader = 20
        private val itemBody = 21
        private val itemFooter = 22
        override fun onCreateViewHolder(p0: ViewGroup, p1: Int): RecyclerView.ViewHolder {
            return when(p1){
                itemHeader -> HeaderHolder(ItemHeaderBinding.inflate(LayoutInflater.from(p0.context), p0, false))
                itemBody -> BodyHolder(ItemNameBinding.inflate(LayoutInflater.from(p0.context), p0, false))
                else -> FooterHolder(ItemFooterBinding.inflate(LayoutInflater.from(p0.context), p0, false))
            }
        }

        override fun getItemCount(): Int = list.size

        override fun onBindViewHolder(p0: RecyclerView.ViewHolder, p1: Int) {
            if (p0.adapterPosition == 0 || p0.adapterPosition == list.size - 1)
                return

            val body : BodyHolder = p0 as BodyHolder
            body.binding.tvName.text = list[p0.adapterPosition]
        }

        override fun onViewRecycled(holder: RecyclerView.ViewHolder) {
            super.onViewRecycled(holder)
            Log.d("onViewRecycled", "view ${holder.adapterPosition} recycled")
        }

        override fun getItemViewType(position: Int): Int {
            return when (position) {
                0 -> itemHeader
                list.size - 1 -> itemFooter
                else -> itemBody
            }


        }
    }

    inner class HeaderHolder(val binding : ItemHeaderBinding) : RecyclerView.ViewHolder(binding.root)

    inner class BodyHolder(val binding : ItemNameBinding) : RecyclerView.ViewHolder(binding.root)

    inner class FooterHolder(val binding : ItemFooterBinding) : RecyclerView.ViewHolder(binding.root)