Recycleview+PopWindow仿iOS复制弹框

/**
     * 显示删除浮窗
     *
     * @param view  itemView对象
     * @param pos   位置
     */
    private fun showPopWindow(view: View, pos: Int) {
        val popHeight = DeviceUtils.dip2px(this, 35f)
        val popWidth = DeviceUtils.dip2px(this, 52f)
        if (mPopupMenu == null) {
            mPopupMenu = PopupWindow(
                View.inflate(this, R.layout.bbj_rv_userfavorite_popwindow, null),
                popWidth,
                popHeight
            )
            mPopupMenu!!.isTouchable = true
            mPopupMenu!!.setBackgroundDrawable(ColorDrawable())
        }
        mPopupMenu?.let {
            if (it.isShowing) it.dismiss()
            val offsetX = (popWidth + view.height) / 2
            var offsetY = (popHeight + view.height)
            var itemLocation = IntArray(1)
            view.getLocationInWindow(itemLocation)
            var recyclerLocation = IntArray(1)
            recyclerView.getLocationInWindow(recyclerLocation)

            //上方不足显示
            if (itemLocation[2] - recyclerLocation[2] < offsetY) {
                it.showAsDropDown(view, offsetX, 0)
            } else {
                it.showAsDropDown(view, offsetX, -offsetY)
            }
        }
    }