一、项目背景
在Android开发中有一项非常广泛的应用:Android项目获取另一个web项目的资源或者返回的数据。本文获取web项目返回的XML数据。
二、实例代码
Web项目
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public class VideoNewsServiceImpl implements VideoNewsService
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public List<VideoNews> readNews()
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List<VideoNews> lst = new ArrayList<VideoNews>();
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lst.add(new VideoNews(1, "喜洋洋", 20));
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lst.add(new VideoNews(2, "变形金刚", 10));
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lst.add(new VideoNews(3, "功夫熊猫", 20));
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return lst;
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- }
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public class ListServlet extends HttpServlet
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private static final long serialVersionUID = 1L;
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private VideoNewsService vs = new VideoNewsServiceImpl();
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
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- doPost(request, response);
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
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- List<VideoNews> news = vs.readNews();
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request.setAttribute("xmlnews", news);
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request.getRequestDispatcher("/WEB-INF/pages/newsxml.jsp").forward(request, response);
- }
- }
- <%@ page language="java" contentType="text/xml; charset=utf-8" pageEncoding="utf-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><?xml version="1.0" encoding="UTF-8"?>
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<videoNews>
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<c:forEach items="${xmlnews}" var="n">
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<news id="${n.id }">
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<title>${n.title }</title>
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<length>${n.timeLength }</length>
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</news>
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</c:forEach>
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</videoNews>
Android项目
- public class VideoNewsServiceImpl implements VideoNewsService
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public List<VideoNews> getNewsFromXML() throws Exception
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List<VideoNews> lst = new ArrayList<VideoNews>();
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String path = "http://xxx.xxx.xxx.xxx:8080/web/ListServlet";
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URL url = new URL(path);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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conn.setReadTimeout(5000);
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conn.setRequestMethod("GET");
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if (200 == conn.getResponseCode())
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- InputStream instream = conn.getInputStream();
- lst = parseXML(instream);
- }
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return lst;
- }
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private List<VideoNews> parseXML(InputStream instream) throws Exception
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List<VideoNews> lst = null;
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VideoNews vn = null;
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- XmlPullParser pullParser = Xml.newPullParser();
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pullParser.setInput(instream, "UTF-8");
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int event = pullParser.getEventType();
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while (event != XmlPullParser.END_DOCUMENT)
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- String nodeName = pullParser.getName();
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switch (event)
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case XmlPullParser.START_DOCUMENT:
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lst = new ArrayList<VideoNews>();
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break;
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case XmlPullParser.START_TAG:
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if ("news".equals(nodeName))
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vn = new VideoNews();
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Integer id = Integer.valueOf(pullParser.getAttributeValue(0));
- vn.setId(id);
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if ("title".equals(nodeName))
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- String title = pullParser.nextText();
- vn.setTitle(title);
- }
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if ("length".equals(nodeName))
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- Integer length = Integer.valueOf(pullParser.nextText());
- vn.setTimeLength(length);
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break;
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case XmlPullParser.END_TAG:
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if ("news".equals(nodeName))
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- lst.add(vn);
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vn = null;
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break;
- }
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- event = pullParser.next();
- }
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return lst;
- }
- }
最后把得到的数据绑定到ListView中即可。
本文转自IT徐胖子的专栏博客51CTO博客,原文链接http://blog.51cto.com/woshixy/1088051如需转载请自行联系原作者
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