Android RecyclerView设置下拉刷新的实现方法

<android.support.v4.widget.SwipeRefreshLayout
  android:id="@+id/refresh"
  android:layout_width = "match_parent"
  android:layout_height = "match_parent" >

  <android.support.v7.widget.RecyclerView
    android:id = "@+id/rv_list"
    android:layout_width = "match_parent"
    android:layout_height = "match_parent"
    android:background = "#FF504F4F" />

</android.support.v4.widget.SwipeRefreshLayout >

final Handler handler = new Handler();
// 下拉时触发SwipeRefreshLayout的下拉动画，动画完毕之后就会回调这个方法
swipeRefreshView.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
  @Override
  public void onRefresh() {

    // 开始刷新，设置当前为刷新状态
    //swipeRefreshLayout.setRefreshing(true);

    // 这里是主线程
    // 一些比较耗时的操作，比如联网获取数据，需要放到子线程去执行
    new Thread(){
      @Override
      public void run () {
        super.run();
        //同步加载网络数据 
        //加载数据 完毕后 关闭刷新状态 切回主线程
        handler.postDelayed(new Runnable() {
          @Override
          public void run() {

            // 加载完数据设置为不刷新状态，将下拉进度收起来
            swipeRefreshView.setRefreshing(false);
          }
        },100);
      }
    }.start();


  }
});