select and unselect RecyclerView item without using checkbox or radio button or etc

Question

Select and Unselect items in recyclerview without using any checkbox or radio button or etc.

• I want to select 1st recyclerview item on longclick and then all the other item on single click in recyclerview list.
• Unselect item on single click as well on recyclerview list.

UPDATE()

    holder.itemView.setOnLongClickListener(View.OnLongClickListener {

                    if (selectedPosition == position) {
                        selectedPosition = -1
                        notifyItemChanged(position);
                    }
                    selectedPosition = position;
                    notifyItemChanged(position);}

After one long click i want to select and unselect item only on single click