网络请求——XML解析

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请求到的是xml文件
package com.example.kaoshi;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;import java.util.ArrayList;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import com.example.adapter.MyAdapter;import com.example.bean.News;import android.os.AsyncTask;import android.os.Bundle;import android.app.Activity;import android.util.Xml;import android.view.Menu;import android.widget.ListView;public class MainActivity extends Activity {    private ListView lv_list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv_list = (ListView) findViewById(R.id.lv_list);        // 网络请求数据        MyAsyncTask myAsyncTask = new MyAsyncTask();        myAsyncTask.execute("http://www.oschina.net/action/api/news_list");    }    public class MyAsyncTask extends AsyncTask<String, Void, String> {        private ArrayList<News> newList;        private News news;        private XmlPullParser pullParser;        @Override        protected String doInBackground(String... params) {            //得到数据            String info = getInfo(params[0]);            return info;        }        @Override        protected void onPreExecute() {            // TODO Auto-generated method stub            super.onPreExecute();        }        @Override        protected void onPostExecute(String result) {            pullParser = Xml.newPullParser();            try {                //将string转换成字节流                pullParser.setInput(                        new ByteArrayInputStream(result.getBytes("UTF-8")),                        "utf-8");                //得到事件类型                int eventType = pullParser.getEventType();                while (eventType != pullParser.END_DOCUMENT) {                    String name = pullParser.getName();                    switch (eventType) {                    case XmlPullParser.START_TAG:                        if ("newslist".equals(name)) {                            // 创建集合                            newList = new ArrayList<News>();                        } else if ("news".equals(name)) {                            // 创建对象                            news = new News();                        } else if ("id".equals(name)) {                            // 属性                            news.id = pullParser.nextText();                        } else if ("title".equals(name)) {                            // 属性                            news.title = pullParser.nextText();                        } else if ("body".equals(name)) {                            // 属性                            news.body = pullParser.nextText();                        }                        break;                    case XmlPullParser.END_TAG:                        if ("news".equals(name)) {                            newList.add(news);                        }                        break;                    default:                        break;                    }                    eventType = pullParser.next();                }            } catch (Exception e) {                // TODO Auto-generated catch block                e.printStackTrace();            }            lv_list.setAdapter(new MyAdapter(MainActivity.this, newList));            super.onPostExecute(result);        }    }    public String getInfo(String string) {        try {            URL url = new URL(string);            HttpURLConnection openConnection = (HttpURLConnection) url                    .openConnection();            openConnection.setRequestMethod("GET");            openConnection.setReadTimeout(5000);            int responseCode = openConnection.getResponseCode();            if (responseCode == 200) {                //得到流                InputStream inputStream = openConnection.getInputStream();                int len;                byte[] b = new byte[1024];                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();                while ((len = inputStream.read(b)) != -1) {                    outputStream.write(b, 0, len);                }                System.out.println(outputStream.toString());                return outputStream.toString();            }        } catch (Exception e1) {            // TODO Auto-generated catch block            e1.printStackTrace();        }        return null;    }}
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