itemTouchHelperCallback.kt

 private val itemTouchHelper by lazy {
        val simpleItemTouchCallback = object : ItemTouchHelper.SimpleCallback(UP or DOWN or START or END, 0) {

            override fun onMove(recyclerView: RecyclerView,
                                viewHolder: RecyclerView.ViewHolder,
                                target: RecyclerView.ViewHolder): Boolean {
              //on move lets you check if an item has been moved from its position either up or down 
                return true
            }

            override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
            
                //on swipe tells you when an item is swiped left or right from its position ( swipe to delete)
            }

            override fun onSelectedChanged(viewHolder: RecyclerView.ViewHolder?, actionState: Int) {
                super.onSelectedChanged(viewHolder, actionState)

            //when an item changes its location that is currently selected this funtion is called
           
            }

            override fun clearView(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder) {
                super.clearView(recyclerView, viewHolder)

                //when we stop dragging , swiping or moving an item this function is called
            }
        }

        ItemTouchHelper(simpleItemTouchCallback)
    }