问题描述
public class Mp3Player extends ListActivity { /** Called when the activity is first created. */public final static int UPDATE = 1;public final static int ABOUT = 2; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); }@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// TODO Auto-generated method stubmenu.add(0, UPDATE, 1, R.string.update);menu.add(0, ABOUT, 2, R.string.about);return super.onCreateOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// TODO Auto-generated method stubif(item.getItemId() == UPDATE) {String xml = downloadXml("http://192.168.254.1:8080/mp3/resouces.xml");（1）System.out.println("xml--------"+xml);parse(xml);}else if(item.getItemId() == ABOUT) {}return super.onOptionsItemSelected(item);}public String downloadXml(String urlStr) {HttpDownloader download = new HttpDownloader();String result = download.download(urlStr);return result;}public List<Mp3Info> parse(String xmlStr) {//创建sax解析器工厂SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();StringReader strR = new StringReader(xmlStr);InputSource input = new InputSource(strR);System.out.println("xml--------"+xmlStr);try {XMLReader xmlReader = saxParserFactory.newSAXParser().getXMLReader();List<Mp3Info> info = new ArrayList<Mp3Info>();Mp3ListContentHandler mp3ListContentHandler = new Mp3ListContentHandler(info);xmlReader.setContentHandler(mp3ListContentHandler);xmlReader.parse(input);（2）System.out.println("info size-----------"+info.size());（3）for(Iterator iterator = info.iterator(); iterator.hasNext();) {Mp3Info mp3Info = (Mp3Info)iterator.next();System.out.println("mp3Info-------"+mp3Info);}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();} return null;}}上面是activity类(1)处可以输出完整的xml信息(2)(3)处均不能被执行public class Mp3ListContentHandler extends DefaultHandler {private List<Mp3Info> infos = null;private Mp3Info mp3Info = null;private String targetName = null;public Mp3ListContentHandler(List<Mp3Info> infos) {super();this.infos = infos;}public List<Mp3Info> getInfos() {return infos;}public void setInfos(List<Mp3Info> infos) {this.infos = infos;}@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {String temp = new String(ch, start, length);if(targetName.equals("id")) {mp3Info.setId(temp);}else if(targetName.equals("mp3.name")) {mp3Info.setMp3Name(temp);}else if(targetName.equals("mp3.size")) {mp3Info.setMp3Size(temp);}else if(targetName.equals("lrc.name")) {mp3Info.setLrcName(temp);}else if(targetName.equals("lrc.size")) {mp3Info.setLrcSize(temp);}}@Overridepublic void startDocument() throws SAXException {// TODO Auto-generated method stubsuper.startDocument();}@Override(1)public void endDocument() throws SAXException {// TODO Auto-generated method stubSystem.out.println("endDocument methoed is start-----");}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {// TODO Auto-generated method stubif(qName.equals("resource")) {infos.add(mp3Info);(2)System.out.println("infos is --------"+infos);}this.targetName = "";}@Overridepublic void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException {// TODO Auto-generated method stubthis.targetName = localName;if(targetName.equals("resource")) {mp3Info = new Mp3Info();}}}这是处理xml文件的Handler(1)处方法不能被执行(2)处可以输出正常信息小弟被这个问题卡了好几天了，恳求大神们指点指点！
解决方案
我这边运行mars老师的代码没有问题，你看看你的resouces.xml格式，估计是这个问题