android与JAVAEE结合开发的关键代码（json与xml两种方法）
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package cn.itcast.service;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.ArrayList;import java.util.List;import org.json.JSONArray;import org.json.JSONObject;import org.xmlpull.v1.XmlPullParser;import android.util.Xml;import cn.itcast.domain.News;import cn.itcast.utils.StreamTool;public class VideoNewsService {/** * 获取最新的视频资讯 * @return * @throws Exception */public static List<News> getJSONLastNews() throws Exception{String path = "http://192.168.0.168:8080/web/ListServlet?format=json";URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(5000);conn.setRequestMethod("GET");if(conn.getResponseCode() == 200){InputStream inStream = conn.getInputStream();return parseJSON(inStream);}return null;}/** * 解析JSON数据 * @param inStream * @return */private static List<News> parseJSON(InputStream inStream) throws Exception{List<News> newses = new ArrayList<News>();byte[] data = StreamTool.read(inStream);String json = new String(data);JSONArray array = new JSONArray(json);for(int i = 0 ; i < array.length() ; i++){JSONObject jsonObject = array.getJSONObject(i);News news = new News(jsonObject.getInt("id"), jsonObject.getString("title"), jsonObject.getInt("timelength"));newses.add(news);}return newses;}/** * 获取最新的视频资讯 * @return * @throws Exception */public static List<News> getLastNews() throws Exception{String path = "http://192.168.0.168:8080/web/ListServlet";URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(5000);conn.setRequestMethod("GET");if(conn.getResponseCode() == 200){InputStream inStream = conn.getInputStream();return parseXML(inStream);}return null;}/** * 解析服务器返回的xml数据<?xml version="1.0" encoding="UTF-8" ?> <videonews> <news id="35"> <title>喜羊羊与灰太狼全集</title> <timelength>90</timelength> </news> <news id="12"> <title>老张与灰太狼</title> <timelength>20</timelength> </news> <news id="56"> <title>老方与LILI</title> <timelength>30</timelength> </news></videonews> * @param inStream * @return */private static List<News> parseXML(InputStream inStream) throws Exception {List<News> newses = new ArrayList<News>();News news = null;XmlPullParser parser = Xml.newPullParser();parser.setInput(inStream, "UTF-8");int event = parser.getEventType();while( event != XmlPullParser.END_DOCUMENT){switch (event) {case XmlPullParser.START_TAG:if("news".equals(parser.getName())){int id = new Integer(parser.getAttributeValue(0));news = new News();news.setId(id);}else if("title".equals(parser.getName())){news.setTitle(parser.nextText());}else if("timelength".equals(parser.getName())){news.setTimelength(new Integer(parser.nextText()));}break;case XmlPullParser.END_TAG:if("news".equals(parser.getName())){newses.add(news);news = null;}break;}event = parser.next();}return newses;}}把数据绑定到LIST上
package cn.itcast.news;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import cn.itcast.domain.News;import cn.itcast.service.VideoNewsService;import android.app.Activity;import android.os.Bundle;import android.widget.ListView;import android.widget.SimpleAdapter;public class MainActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ListView listView = (ListView) this.findViewById(R.id.listView); try {List<News> videos = VideoNewsService.getLastNews();//需修改成你本机的Http请求路径List<HashMap<String, Object>> data = new ArrayList<HashMap<String,Object>>();for(News news : videos){HashMap<String, Object> item = new HashMap<String, Object>();item.put("id", news.getId());item.put("title", news.getTitle());item.put("timelength", getResources().getString(R.string.timelength)+ news.getTimelength()+ getResources().getString(R.string.min));data.add(item);}SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item,new String[]{"title", "timelength"}, new int[]{R.id.title, R.id.timelength});listView.setAdapter(adapter);} catch (Exception e) {e.printStackTrace();} }<!-- 访问internet权限 -->
<uses-permission android:name="android.permission.INTERNET"/>
