如何使用itemTouchHelper RecyclerView为滑动菜单绘制三个按钮？

Question

我想使用ItemTouchHelper创建类似的东西：

这张照片是从我当前的项目中拍摄的，但是它是用SwipeRevealLayout创建的，所以我很难对其进行自定义。几天前，我看到了this的问题，并理解可以使用ItemTouchHelper解决了我的问题。我找到了this代码，并试图在我的项目中使用它：

 val simpleCallback = object : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT) {
            override fun onMove(p0: RecyclerView, p1: RecyclerView.ViewHolder, p2: RecyclerView.ViewHolder): Boolean {
                return false
            }

            override fun getSwipeDirs(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder): Int {
                val position = viewHolder.adapterPosition
                if (position != editPosition) {
                    if (editPosition != -1 && flagSwiped) {
                        adapter.notifyItemChanged(position)
                        flagSwiped = false
                        editPosition = position
                    }
                }
                return super.getSwipeDirs(recyclerView, viewHolder)
            }

            override fun onSwiped(holder: RecyclerView.ViewHolder, direction: Int) {

            }

            override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean) {
                val icon: Drawable

                if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
                    val itemView = viewHolder.itemView;
                    val height = itemView.bottom - itemView.top;
                    val width = itemView.right - itemView.left;
                    val iconH = resources.displayMetrics.density * 28;
                    val iconW = resources.displayMetrics.density * 28;
                    if (dX > 0) {


                        val background = RectF(itemView.left.toFloat(), itemView.top.toFloat(), dX, itemView.bottom.toFloat())
                        p.color = Color.parseColor("#FF9800")
                        c.drawRect(background, p)

                        icon = ContextCompat.getDrawable(context!!, android.R.drawable.ic_input_add)!!
                        icon.setColorFilter(Color.WHITE, PorterDuff.Mode.SRC_ATOP)
                        // you can also use icon size
                        // int iconWidth = icon.getIntrinsicWidth();
                        // int iconHeight = icon.getIntrinsicHeight();

                        val rate = abs(dX) / width

                        val iconLeft = (itemView.left - iconW + width / 3 * rate).toInt()
                        val iconTop = (itemView.top + height / 2 - iconH / 2).toInt()
                        val iconRight = (itemView.left + width / 3 * rate).toInt()
                        val iconBottom = (itemView.bottom - height / 2 + iconH / 2).toInt()
                        icon.setBounds(iconLeft, iconTop, iconRight, iconBottom)
                        icon.draw(c)

                    } else if (dX < 0) {

                        val background = RectF(itemView.right.toFloat() + dX, itemView.top.toFloat(), itemView.right.toFloat(), itemView.bottom.toFloat())
                        p.color = Color.parseColor("#E91E63")
                        c.drawRect(background, p)

                        icon = ContextCompat.getDrawable(context!!, android.R.drawable.ic_menu_delete)!!
                        icon.setColorFilter(Color.WHITE, PorterDuff.Mode.SRC_ATOP)

                        val rate = abs(dX) / width

                        val iconLeft = (itemView.right - width / 3 * rate).toInt()
                        val iconTop = (itemView.top + height / 2 - iconH / 2).toInt()
                        val iconRight = (itemView.right + iconW - width / 3 * rate).toInt()
                        val iconBottom = (itemView.bottom - height / 2 + iconH / 2).toInt()
                        icon.setBounds(iconLeft, iconTop, iconRight, iconBottom)
                        icon.draw(c)
                    }
                }

                super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
            }
        }


        val itemTouchHelper = ItemTouchHelper(simpleCallback)
        itemTouchHelper.attachToRecyclerView(settings)

，这是我工作的结果：

如我所见，我可以滑动recyclerview项目，但我不明白两件事：

1. 如何在第一个屏幕截图上添加更多按钮？
2. 所有项目只能刷一次，而我无法返回到项目的正常状态。我只能刷卡而已。