<?xml version="1.0" encoding="utf-8"?>

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

     xmlns:tools="http://schemas.android.com/tools"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     tools:context="com.example.administrator.mydemo.PullActivity">

     <android.support.v4.widget.SwipeRefreshLayout

         android:id="@+id/mpull"

         android:layout_height="match_parent"

         android:layout_width="match_parent"

         >

         <ListView

             android:id="@+id/mlist"

             android:layout_width="match_parent"

             android:layout_height="match_parent">

         </ListView>

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

 </RelativeLayout>

 import android.os.Handler;

 import android.os.Message;

 import android.support.v4.widget.SwipeRefreshLayout;

 import android.support.v7.app.AppCompatActivity;

 import android.os.Bundle;

 import android.widget.ListView;

 import android.widget.SimpleAdapter;

 import android.widget.Toast;

 import java.util.ArrayList;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 public class PullActivity extends AppCompatActivity {

     private SwipeRefreshLayout swipeRefreshLayout;

     private ListView listView;

     private List list;

     private  SimpleAdapter simpleAdapter;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_pull);

         initView();

         setList();

     }

     private void initView(){

         swipeRefreshLayout= (SwipeRefreshLayout) findViewById(R.id.mpull);

         swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {

             @Override

             public void onRefresh() {

                 //

                 new Handler().postDelayed(new Thread(new Runnable() {

                     @Override

                     public void run() {

                         swipeRefreshLayout.setRefreshing(false);

                         //刷新之后发送message

                         Message msg=new Message();

                         msg.what=1;

                         mhandle.sendMessage(msg);

                     }

                 }),3000);

             }

         });

         listView= (ListView) findViewById(R.id.mlist);

     }

     private Handler mhandle=new Handler(){

         @Override

         public void handleMessage(Message msg) {

             super.handleMessage(msg);

             if (msg.what==1){

                 Toast.makeText(getApplicationContext(),"刷新成功！",Toast.LENGTH_SHORT).show();

                 //下拉之后需要加载的数据

                 List mlist=new ArrayList();

                 for (int i=0;i<20;i++){

                     Map map=new HashMap();

                     map.put("img",R.drawable.img);

                     map.put("text","下拉数据"+i);

                     mlist.add(map);

                 }

                 list.addAll(mlist);

                 simpleAdapter.notifyDataSetChanged();

             }

         }

     };

     private void setList(){

         list=new ArrayList();

         for (int i=0;i<20;i++){

             Map map=new HashMap();

             map.put("img",R.drawable.img);

             map.put("text","新数据"+i);

             list.add(map);

         }

         simpleAdapter=new SimpleAdapter(this,list,R.layout.list_item,new String[]{"img","text"},new int[]{R.id.my_img,R.id.my_item});

         listView.setAdapter(simpleAdapter);

     }

 }