在最后一个项目android recyclerview之后显示分隔线

Question

我在回收者视图中添加了一个分隔线

 var itemDecorator =object: DividerItemDecoration(applicationContext, LinearLayoutManager.VERTICAL){

        override fun getItemOffsets(
            outRect: Rect,
            view: View,
            parent: RecyclerView,
            state: RecyclerView.State
        ) {
            var position = parent.getChildAdapterPosition(view);
            outRect.setEmpty();
            if (position == mylist.size - 1) {
               super.getItemOffsets(outRect, view, parent, state);
            //   setDrawable(ContextCompat.getDrawable(applicationContext, R.drawable.finish_scrolling)!!);
            }
        }
    }
   itemDecorator.setDrawable(ContextCompat.getDrawable(applicationContext, R.drawable.selector2)!!);
    rv!!.addItemDecoration(itemDecorator)

我想在最后一项之后显示图像，我将如何处理，或者还有其他方法可以这样做吗？