说明：此项目实在fragment中的，需要依赖library完成，还用到了Xuitls.jar包、使用了Pull解析XML
eclipse中的项目：
//注意：此刷新功能是使用的第三方的PullToRefreshScrollView，因此需要导入第三方library作为依赖
步骤：导入第三方library，依赖：点击你的应用程序右击，再点击properties，再点击Android，再点击add，选中library，点击OK
//请求网路需要配置完网络权限 <uses-permission android:name="android.permission.INTERNET"/>
Android Studio中的项目：导入library，并依赖
导入：点击File，New——>import Module 打开libray的位置，选中libray ,点击OK
依赖：点击Android studio工具栏中的有多个小方块的那个，再点击 app，再点击Dependencies,再点击+符号，再点击Module dependency，选中libray，点击OK，依赖成功
//------------------------------主布局文件-----------------------------------------
注意：高度为match_parent或fill_parent不能为wrap_content，为wrap_content时不显示数据，这个为什么我也不知道，请求大神指教。
<com.handmark.pulltorefresh.library.PullToRefreshListView
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:id="@+id/lv_list"></com.handmark.pulltorefresh.library.PullToRefreshListView>
//------------------------------------------------------------
package com.bwie.test.fragment;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import me.XListView;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import com.bwie.test.R;
import com.bwie.test.adapter.MyAdapter;
import com.bwie.test.bean.News;
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 com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest.HttpMethod;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.util.Xml;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.Toast;
public class Fragment2 extends Fragment{
private List<News> news=new ArrayList<News>();
private MyAdapter adapter;
//设置页数、分页加载
private int ye=1;
private PullToRefreshListView lv;
//使用Handler更新UI
private Handler handler=new Handler(){
public void handleMessage(Message msg) {
switch (msg.what) {
case 0:
//获得请求的网络数据
String text=(String) msg.obj;
//解析XML
toXml(text);
break;
default:
break;
}
}
};
//解析XML
private void toXml(String text) {
News newss=null;
try {
//将读取到的结果码 添加到XML里面
XmlPullParser Parser = Xml.newPullParser();
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(text.getBytes());
Parser.setInput(byteArrayInputStream, "utf-8");
//通过parse获得项目类型 相当于文件里面的属性吧
int eventType = Parser.getEventType();
//判断
while ((eventType != XmlPullParser.END_DOCUMENT)) {
String name = Parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (name.equals("news")) {
newss = new News();
} else if (name.equals("id")) {
String id = Parser.nextText();
newss.setId(id);
} else if (name.equals("title")) {
String title = Parser.nextText();
newss.setTitle(title);
} else if (name.equals("body")) {
String body = Parser.nextText();
newss.setBody(body);
} else if (name.equals("commentCount")) {
String commentCount = Parser.nextText();
newss.setCommentCount(commentCount);
}
else if (name.equals("author")) {
String author = Parser.nextText();
newss.setAuthor(author);
}
else if (name.equals("pubDate")) {
String pubDate = Parser.nextText();
newss.setPubDate(pubDate);
}
break;
case XmlPullParser.END_TAG:
if (name.equals("news")) {
news.add(newss);
//更新适配器
if (adapter == null) {
adapter = new MyAdapter(news,getActivity());
lv.setAdapter(adapter);
} else {
adapter .notifyDataSetChanged();
}
}
break;
default:
break;
}
eventType=Parser.next();
}
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
};
//-------------------onCreateView------------------
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment_item2, null);
//找到控件
lv=(PullToRefreshListView) view.findViewById(R.id.lv);
//获得网络数据
huodeshuju(ye);
//设置适配器
adapter = new MyAdapter(news, getActivity());
lv.setAdapter(adapter);
//设置PullToRefreshListView的模式——BOTH时，为可以上拉加载、可以下拉刷新
lv.setMode(Mode.BOTH);
//两个方法一样
//lv.setMode(PullToRefreshBase.Mode.BOTH);
/*lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2() {
@Override
public void onPullDownToRefresh(PullToRefreshBase refreshView) {
// TODO Auto-generated method stub
}
@Override
public void onPullUpToRefresh(PullToRefreshBase refreshView) {
// TODO Auto-generated method stub
}
});*/
//设置刷新的监听
lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
@Override//下拉刷新
public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
//重新定义为第一页
ye=1;
Toast.makeText(getActivity(),""+ye,Toast.LENGTH_SHORT).show();
//获得数据
huodeshuju(ye);
//刷新适配器
adapter.notifyDataSetChanged();
//创建一个方法结束刷新
new FinishRefresh().execute();
}
@Override//上拉加载更多
public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
//使页数加1
ye++;
Toast.makeText(getActivity(),""+ye,Toast.LENGTH_SHORT).show();
huodeshuju(ye);
adapter.notifyDataSetChanged();
new FinishRefresh().execute();
}
});
return view;
}
//------------获得网络数据----------------------
//使用Xuitls.jar包
private void huodeshuju(int ye) {
//创建httpUtils
HttpUtils httpUtils=new HttpUtils();
httpUtils.send(HttpMethod.GET, "http://www.oschina.net/action/api/news_list?catalog=1&pageIndex="+ye+"&pageSize=20", new RequestCallBack<String>() {
@Override
public void onFailure(HttpException arg0, String arg1) {
}
@Override//请求成功
public void onSuccess(ResponseInfo<String> arg0) {
String str=arg0.result;
Log.i("数据", str);
Message message=new Message();
message.what=0;
message.obj=str;
handler.sendMessage(message);
}
});
}
//-------------------
//完成刷新的方法
private class FinishRefresh extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
try {
//停留2秒
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result){
//刷新完成
lv.onRefreshComplete();
}
}
}