Android RecyclerView ItemTouchHelper 笔记

import android.graphics.Canvas
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.RecyclerView
import java.util.*

class WorkOrderICreatedItemCallback(val adapter: WorkOrderICreatedAdapter)
    : ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP or ItemTouchHelper.DOWN, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT) {
    override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
        Collections.swap(adapter.list, viewHolder.absoluteAdapterPosition, target.absoluteAdapterPosition)
        adapter.notifyItemMoved(viewHolder.absoluteAdapterPosition, target.absoluteAdapterPosition)
        return true
    }

    override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
        adapter.list.removeAt(viewHolder.absoluteAdapterPosition);
        adapter.notifyItemRemoved(viewHolder.absoluteAdapterPosition);
    }

    override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean) {
        super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
//        viewHolder.itemView.translationX = dX
    }
}

        val callback = WorkOrderICreatedItemCallback(adapter)
        val helper = ItemTouchHelper(callback)
        helper.attachToRecyclerView(binding.container)