从recyclerview中的textview获取第一行可见文本

Question

您好，我正在处理一个项目。我需要在其中获得文本视图的第一条可见线。这意味着当textview有100行并且用户已滚动到49行时，我需要获取第50行的数据。

这是我的代码，但是它不起作用，我每次都在获取第一行数据：

recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(final RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            LinearLayoutManager layoutManager = ((LinearLayoutManager) recyclerView.getLayoutManager());
            int firstVisiblePosition = layoutManager.findFirstVisibleItemPosition();

            textView = ((RewardTransactionsAdapter.MyViewHolder) recyclerView.
                    findViewHolderForLayoutPosition(firstVisiblePosition))
                    .itemView.findViewById(R.id.textViewRTTitle);

            Rect r1 = new Rect();
            recyclerView.getHitRect(r1);//gets visible rect of textview
            Layout l = textView.getLayout();
            int line = l.getLineForVertical(-1 * r1.top);//first visible line
            int start = l.getLineStart(line);//visible line start
            int end = l.getLineEnd(line);//visible line end

            String displayed = textView.getText().toString().substring(start, end);
            Log.i("TAG", displayed);


        }
    });