下拉刷新--第三方开源--PullToRefresh

效果预览图：

下载地址：https://github.com/chrisbanes/Android-PullToRefresh

activity_main.xml:

 <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.zzw.testpulltorefresh.MainActivity" >

     <com.handmark.pulltorefresh.library.PullToRefreshListView
         android:id="@+id/listView"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />

 </RelativeLayout>

MainActuvity.java:

 package com.zzw.testpulltorefresh;

 import java.util.ArrayList;
 import java.util.Date;

 import com.handmark.pulltorefresh.library.PullToRefreshBase;
 import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
 import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
 import com.handmark.pulltorefresh.library.PullToRefreshListView;

 import android.app.Activity;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.SystemClock;
 import android.widget.Adapter;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.TextView;
 import android.widget.Toast;

 public class MainActivity extends Activity {

     private PullToRefreshListView listView;
     private ArrayList<String> data;
     private ArrayAdapter adapter;
     private int count = 0;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         data = new ArrayList<String>();

         listView = (PullToRefreshListView) findViewById(R.id.listView);
         // 设置向下滑动时刷新
          listView.setMode(Mode.PULL_FROM_START);
         // 支持下拉和上拉  listView.setMode(Mode.BOTH);
         // 设置监听
         listView.setOnRefreshListener(new OnRefreshListener<ListView>() {

             @Override
             public void onRefresh(PullToRefreshBase<ListView> refreshView) {
                 // 在这完成业务逻辑
                 new MyAsyncTask().execute();
             }
         });

         adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, data);
         listView.setAdapter(adapter);

         // 设置如果数据为空的时候显示什么
         TextView textView = new TextView(this);
         textView.setText("请下拉刷新");
         listView.setEmptyView(textView);
     }

     private class MyAsyncTask extends AsyncTask {

         @Override
         protected void onPreExecute() {
             // 开始刷新
             listView.setRefreshing();
         }

         @Override
         protected Object doInBackground(Object... params) {
             // 假设耗时时间为3秒
             SystemClock.sleep(3000);
             return count++;
         }

         @Override
         protected void onPostExecute(Object result) {

             data.add(0, result + "");
             adapter.notifyDataSetChanged();

             // 设置标签
             listView.setLastUpdatedLabel("最后更新新的时间：" + new Date());

             // 刷新完成
             listView.onRefreshComplete();
             Toast.makeText(getApplicationContext(), "加载成功", 0).show();
         }
     }

 }