【android】scrollview进行定位问题

scrollview进行定位，为什么是把整个scrollview进行移动了，而不是对scrollview里面的内容进行移动呢

 if (replyId != 0) {
 for (int i = 0; i < reply_list.size(); i++) {
 if (reply_list.get(i).getReplyId() == replyId) {
 position = i;
 LogUtil.e("Tag", position + "--------i--------");
 }
 }
 LogUtil.e("Tag", ListViewForScrollView.setListViewItemPositionHeight(tListview, position) + "-------------");
 // pScrollview.scrollTo(0,ListViewForScrollView.setListViewItemPositionHeight(tListview, position));
 pScrollview.scrollTo(0,320);
 // tListview.setSelection(position);

// Handler handler = new Handler();

 // handler.postDelayed(runnable, 200); 
                    }

                    adapter.notifyDataSetChanged();