Android官方提供的下拉刷新控件——SwipeRefreshLayout

 <?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);
     }
 }