Question

现在我有一个功能性的向左滑动以在recyclerview中删除两个布局（前景和背景）。我在代码中使用了itemtouchhelper。但是，我想向左滑动并向右滑动以显示不同的颜色和图标，就像在谷歌收件箱中一样。我该如何实现呢？

代码只是标准的itemtouchhelper.simplecallback，在xml中有2个布局。我在各地搜索，只发现单个滑动选项，单个图标和单色

Answer 1

使用 ItemTouchHelper 来实施类似Gmail的功能

在设置recyclerView

后调用以下函数

import glob
import os
word="excel"

for (dirname, dirs, files) in os.walk("/batch/"):
    for file_ in files :
        if  file_.startswith(word):
                print(file_)
                print(os.path.join(dirname, file_))

    for dir_ in dirs :
        myfiles  = glob.glob(os.path.join(dirname,dir_))
        for myfile in myfiles:
            if  myfile.startswith(word):
                    print(myfile)
                    print(os.path.join(dirname,myfiles))

其中对象p是绘画对象private fun initSwipe() { val simpleItemTouchCallback = object : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT) { override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean { return false } override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) { val position = viewHolder.adapterPosition if (direction == ItemTouchHelper.LEFT) { //Logic to do when swipe left } else { //Logic to do when swipe right } } override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean) { val icon: Bitmap if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) { //Drawing for Swife Right val itemView = viewHolder.itemView val height = itemView.bottom.toFloat() - itemView.top.toFloat() val width = height / 3 if (dX > 0) { p.color = Color.parseColor("#2F2FD3") val background = RectF(itemView.left.toFloat(), itemView.top.toFloat(), dX, itemView.bottom.toFloat()) c.drawRect(background, p) icon = BitmapFactory.decodeResource(resources, R.drawable.ic_archive) val icon_dest = RectF(itemView.left.toFloat() + width, itemView.top.toFloat() + width, itemView.left.toFloat() + 2 * width, itemView.bottom.toFloat() - width) c.drawBitmap(icon, null, icon_dest, p) } else { //Drawing for Swife Left p.color = Color.parseColor("#D32F2F") val background = RectF(itemView.right.toFloat() + dX, itemView.top.toFloat(), itemView.right.toFloat(), itemView.bottom.toFloat()) c.drawRect(background, p) icon = BitmapFactory.decodeResource(resources, R.drawable.ic_delete) val icon_dest = RectF(itemView.right.toFloat() - 2 * width, itemView.top.toFloat() + width, itemView.right.toFloat() - width, itemView.bottom.toFloat() - width) c.drawBitmap(icon, null, icon_dest, p) } } super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive) } } val itemTouchHelper = ItemTouchHelper(simpleItemTouchCallback) itemTouchHelper.attachToRecyclerView(YOUR_RECYCLER_VIEW) } 希望这可以帮到你。

如何在Recyclerview Android中滑动以删除和滑动以两种颜色存档

1 个答案: