<android.support.v4.widget.SwipeRefreshLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <android.support.v7.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

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

  private SwipeRefreshLayout mSwipeRefreshLayout;//先声明，你懂的

    mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.recyclerView);
    mSwipeRefreshLayout.setSize(SwipeRefreshLayout.LARGE);
    //自定义加载的圆形背景颜色，下拉的圆圈背景颜色
//    mSwipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.gray);
    //自定义加载的圆条颜色，转动的圆条颜色
    mSwipeRefreshLayout.setColorSchemeResources(R.color.title_blue, R.color.green, R.color.orange);
    mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
      @Override
      public void onRefresh() {
        mHandler.postDelayed(new Runnable() {
          @Override
          public void run() {
          //在这里编写手势下拉刷新的监听，也就是一下拉就进行这里
          }
        }, 2500);
        //正常情况下是在加载完成后回调，这里简单模拟延时
        Toast.makeText(MainActivity.this, "正在刷新", Toast.LENGTH_SHORT).show();
        new Handler().postDelayed(new Runnable() {
          @Override
          public void run() {
            Toast.makeText(MainActivity.this, "刷新完成", Toast.LENGTH_SHORT).show();
            mSwipeRefreshLayout.setRefreshing(false);
          }
        }, 3000);//3000指延时6s
      }
    });