Android中判断listview是否滑动到顶部和底部的实现方法

private void setLiseners() {    // listview设置滑动监听    lsv_new_house.setOnScrollListener(new AbsListView.OnScrollListener() {      @Override      public void onScrollStateChanged(AbsListView absListView, int i) {      }      @Override      public void onScroll(AbsListView absListView, int firstVisibleItem, int visibleItemCount, int totalItemCount) {        if(firstVisibleItem == 0){          View first_view = lsv_new_house.getChildAt(0);          if(first_view != null && first_view.getTop() == 0){//            LogUtils.e("已经滚动到顶部了");            bl_down = true;// 可以下拉刷新了          }else {//            LogUtils.e("还没到顶部");            bl_down = false;// 未滑动到顶部不让下拉刷新          }        }        if(firstVisibleItem + visibleItemCount == totalItemCount){          View last_view = lsv_new_house.getChildAt(lsv_new_house.getChildCount() - 1);//          LogUtils.e("height = " + lsv_new_house.getBottom());// 最后一个item的底部与listview第一个item顶部之间的距离//          int h = lsv_new_house.getHeight();//          LogUtils.e("h = " + h);          if(last_view != null && last_view.getBottom() == lsv_new_house.getHeight()){//            LogUtils.e("已经滚动到最底部了");            bl_up = true;// 可以上拉加载了          }else {//            LogUtils.e("还没到底部");            bl_up = false;// 未滑动到底部不让上拉加载          }        }      }    });  }