android的DOM解析

package com.SXNew; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import java.util.ArrayList; import java.util.List; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import android.app.Activity; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.AdapterView.OnItemClickListener; public class SXNew extends Activity { ListView list; OnItemClickListener mylist; EarthQuakeInfo selectedQuake; ArrayAdapter<EarthQuakeInfo> adapter; private ArrayList<EarthQuakeInfo> infoList = new ArrayList<EarthQuakeInfo>(); //用于存放网址的集合 private List<String> newsUrlList=new ArrayList<String>(); NodeList nl; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); //设置用户界面 list = (ListView)this.findViewById(R.id.list); mylist = new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { //将存放在集合中的网址解析出来 String url=newsUrlList.get(arg2).trim(); Intent intent =new Intent(Intent.ACTION_VIEW, Uri.parse(url)); startActivity(intent); } }; list.setOnItemClickListener(mylist); //设置ListView的内容为infoList adapter = new ArrayAdapter<EarthQuakeInfo>(this,android.R.layout.simple_list_item_1,infoList); //设置ListView的适配器为adapter list.setAdapter(adapter); getInfo(); //获得infoList的具体内容，这样ListVie才会有新闻信息显示 } /** 刷新数据，获得最新地址信息 */ private void getInfo() { // 获得XML URL url; try { url = new URL("http://news.baidu.com/n?cmd=7&loc=8205&name=%C9%C2%CE%F7&tn=rss"); URLConnection connection = url.openConnection(); HttpURLConnection httpConnection = (HttpURLConnection)connection; int responseCode = httpConnection.getResponseCode(); //判断Dom是否解析完毕 if (responseCode == HttpURLConnection.HTTP_OK) { // 1.得到DOM解析器的工厂实例 DocumentBuilderFactory dbfactory = DocumentBuilderFactory.newInstance(); // 2.从DOM工厂获得DOM解析器 DocumentBuilder db = dbfactory.newDocumentBuilder(); //3. 把要解析的XML文档转化为输入流 InputStream in = httpConnection.getInputStream(); // 4. 解析XML文档的输入流，得到一个Document Document dom = db.parse(in); //（5）得到XML文档的根节点 Element docEle = dom.getDocumentElement(); // 清空旧的地震信息 infoList.clear(); // 获得地震信息的列表 nl = docEle.getElementsByTagName("item"); if (nl != null && nl.getLength() > 0) { for (int i = 0 ; i < nl.getLength(); i++) { Element entry = (Element)nl.item(i); Element title = (Element)entry.getElementsByTagName("title").item(0); Element geo = (Element)entry.getElementsByTagName("description").item(0); Element link1 = (Element)entry.getElementsByTagName("link").item(0); String details = title.getFirstChild().getNodeValue(); String point = geo.getFirstChild().getNodeValue(); String link=link1.getFirstChild().getNodeValue(); details = details.split(",")[0].trim(); point =point.split(",") [0] .trim(); link=link.split(",")[0].trim(); //将获得的网址全部存放在一个集合中 newsUrlList.add(link); System.out.println("details=============="+details); System.out.println("point==================="+point); System.out.println("link==================="+link); EarthQuakeInfo info = new EarthQuakeInfo(details,point); // 处理新的地震信息 newEntry(info); } } } } catch (Exception e) { e.printStackTrace(); } } //将解析的新闻内容在手机中显示 private void newEntry(EarthQuakeInfo info) { // 将新的地址信息条目加入列表中 infoList.add(info); // 通知array adapter adapter.notifyDataSetChanged(); } //新闻信息类 public class EarthQuakeInfo { public String point; public String details; public EarthQuakeInfo(String d, String de) { point = d; details = de; } @Override public String toString() { return "标题："+point + "\n 内容：" + details; } } }