如何监听RecyclerView滑动过程

 mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                switch (newState){
                        /*正在拖拽*/
                    case RecyclerView.SCROLL_STATE_DRAGGING:
                        break;
                        /*滑动停止*/
                    case RecyclerView.SCROLL_STATE_IDLE:
                        break;
                        /*惯性滑动中*/
                    case RecyclerView.SCROLL_STATE_SETTLING:
                        break;
                }
            }

            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                LinearLayoutManager manager = (LinearLayoutManager) recyclerView.getLayoutManager();
                //经测试第一个完整的可见的item位置，若为0则是最上方那个;在item超过屏幕高度的时候只有第一个item出现的时候为0 ，其他时候会是一个负的值
                //此方法常用作判断是否能下拉刷新，来解决滑动冲突
                int findFirstCompletelyVisibleItemPosition = ((LinearLayoutManager) manager).findFirstCompletelyVisibleItemPosition();
                //最后一个完整的可见的item位置
                int findLastCompletelyVisibleItemPosition =  ((LinearLayoutManager) manager).findLastCompletelyVisibleItemPosition();
                //第一个可见的位置
                int findFirstVisibleItemPosition =  ((LinearLayoutManager) manager).findFirstVisibleItemPosition();
                //最后一个可见的位置
                int findLastVisibleItemPosition =  ((LinearLayoutManager) manager).findLastVisibleItemPosition();
                //如果有滑动冲突--可以用以下方法解决(如果可见位置是position==0的话才能有下拉刷新否则禁掉)
//                mSwipeRefreshLayout.setEnabled(findFirstCompletelyVisibleItemPosition==0);
                //在网上还看到一种解决滑动冲突的方法  
                int topPosition = (recyclerView == null || recyclerView.getChildCount() == 0) ? 0 : recyclerView.getChildAt(0).getTop();
                Log.e("touch", "onScroll:" + topPosition);
//                mSwipeRefreshLayout.setEnabled(topPosition >= 0);


         /*获取列表中可见的itemView*/
        View childView = linearLayoutManager.findViewByPosition(findFirstCompletelyVisibleItemPosition);
       /*获取当前可见的itemView  下标从零开始算起*/
       View childView1 = recyclerView.getChildAt(findFirstCompletelyVisibleItemPosition);
       /**获取当前下标的viewholder*/                         
        TestAdapter.ViewHolder viewHolder = (TestAdapter.ViewHolder) recyclerView.getChildViewHolder(childView);
            }
        });