RecyclerView滑动监听

recyclerView.addOnScrollListener(new () { /** * Callback method to be invoked when the RecyclerView has been scrolled. This will be * called after the scroll has completed. * This callback will also be called if visible item range changes after a layout * calculation. In that case, dx and dy will be 0. * @param recyclerView The RecyclerView which scrolled. * @param dx The amount of horizontal scroll. * @param dy The amount of vertical scroll. */ @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); manager = ();//获取LayoutManager //经过测试LinearLayoutManager和GridLayoutManager有以下的方法,这里只针对LinearLayoutManager if (manager instanceof LinearLayoutManager) { //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 || () == 0) ? 0 : (0).getTop();

Log.e("touch", "onScroll:" + topPosition);

mSwipeRefreshLayout.setEnabled(topPosition >= 0);

      }
    }
});