RecyclerViewのならべかえ

MoveItem.kt

val itemTouchHelper = ItemTouchHelper(object :
    ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP or ItemTouchHelper.DOWN, ItemTouchHelper.LEFT) {
        
    override fun onMove(
        recyclerView: RecyclerView,
        viewHolder: RecyclerView.ViewHolder,
        target: RecyclerView.ViewHolder
    ): Boolean {
        val fromPosition = viewHolder.adapterPosition
        val toPosition = target.adapterPosition
        list.adapter?.notifyItemMoved(fromPosition, toPosition)
        sampleViewModel.moveItem(from = fromPosition, to = toPosition)
        return true
    }

    override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
        viewHolder?.let {
            list.adapter?.notifyItemRemoved(viewHolder.adapterPosition)
            sampleViewModel.removeItem(position = viewHolder.adapterPosition)
        }
    }
})
itemTouchHelper.attachToRecyclerView(list)