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Android-RecyclerView刷卡动画不会消失

android-recyclerview animation android

Daniele · 技术社区 · 6 年前

我在recyclerView项上设置了一个滑动手势,以便对其进行编辑。我是这样做的:

private val swipeHelper = 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 //get position which is swipe

            if (direction == ItemTouchHelper.RIGHT) {
                â¦ // do stuff
            }
        }

    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) {
                val itemView = viewHolder.itemView
                val height: Float = (itemView.bottom.toFloat() - itemView.top.toFloat())
                val width = height / 3

                if (dX > 0) {
                    paint.color = Color.parseColor("#FF9300")
                    val background = RectF(itemView.left.toFloat(), itemView.top.toFloat(), dX, itemView.bottom.toFloat())
                    c.drawRect(background, paint)
                    icon = BitmapFactory.decodeResource(resources, R.drawable.pencil)
                    val iconDest = RectF(
                            itemView.left.toFloat() + width,
                            itemView.top.toFloat() + width,
                            itemView.left.toFloat() + 2*width,
                            itemView.bottom.toFloat() - width)
                    c.drawBitmap(icon, null, iconDest, paint)
                }
            }
            super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
        }

}

我面临的问题是,我不知道如何解决这个问题,因为我没有删除元素,所以在我完全重新启动活动之前,animatino不会重置。

下面是一幅解释图:

有人处理过这个问题吗?你知道如何在不重启整个活动的情况下修复它吗?

2 回复 | 直到 6 年前

Punit Sharma 6 年前

呼叫 notifyItemChanged 在你的适配器上。这将重置适配器。

mohammad reza sarsarabi 6 年前

你可以在你的活动中通过打电话 notifyDatasetChanged(); 或 notifyItemChanged(); :

    ItemTouchHelper.SimpleCallback callback = new RecyclerItemTouchHelper(this, 0, ItemTouchHelper.LEFT
            , new RecyclerItemTouchHelper.RecyclerItemTouchHelperListener() {
            @Override
            public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction, final int position) {
            if (direction == ItemTouchHelper.LEFT) {
                // do what you want here and after that call the function below:
                recyclerAdapter.notifyItemChanged(position);
            }
        }
    });
    new ItemTouchHelper(callback).attachToRecyclerView(recyclerView);