android编程之XML文件解析方法详解(附源码)

<?xml version="1.0" encoding="utf-8"?>
<channel>
<item id="0" url="http://www.baidu.com">百度</item>
<item id="1" url="http://www.qq.com">腾讯</item>
<item id="2" url="http://www.sina.com.cn">新浪</item>
<item id="3" url="http://www.taobao.com">淘宝</item>
</channel>

public class SAXPraserHelper extends DefaultHandler {
 final int ITEM = 0x0005;
 List<channel> list;
 channel chann;
 int currentState = 0;
 public List<channel> getList() {
  return list;
 }
 /*
 * 接口字符块通知
 */
 @Override
 public void characters(char[] ch, int start, int length)
  throws SAXException {
  // TODO Auto-generated method stub
 // super.characters(ch, start, length);
  String theString = String.valueOf(ch, start, length);
  if (currentState != 0) {
  chann.setName(theString);
  currentState = 0;
  }
  return;
 }
 /*
 * 接收文档结束通知
 */
 @Override
 public void endDocument() throws SAXException {
  // TODO Auto-generated method stub
  super.endDocument();
 }
 /*
 * 接收标签结束通知
 */
 @Override
 public void endElement(String uri, String localName, String qName)
  throws SAXException {
  // TODO Auto-generated method stub
  if (localName.equals("item"))
  list.add(chann);
 }
 /*
 * 文档开始通知
 */
 @Override
 public void startDocument() throws SAXException {
  // TODO Auto-generated method stub
  list = new ArrayList<channel>();
 }
 /*
 * 标签开始通知
 */
 @Override
 public void startElement(String uri, String localName, String qName,
  Attributes attributes) throws SAXException {
  // TODO Auto-generated method stub
  chann = new channel();
  if (localName.equals("item")) {
  for (int i = 0; i < attributes.getLength(); i++) {
   if (attributes.getLocalName(i).equals("id")) {
   chann.setId(attributes.getValue(i));
   } else if (attributes.getLocalName(i).equals("url")) {
   chann.setUrl(attributes.getValue(i));
   }
  }
  currentState = ITEM;
  return;
  }
  currentState = 0;
  return;
 }
}

private List<channel> getChannelList() throws ParserConfigurationException, SAXException, IOException
 {
  //实例化一个SAXParserFactory对象
  SAXParserFactory factory=SAXParserFactory.newInstance();
  SAXParser parser;
  //实例化SAXParser对象，创建XMLReader对象，解析器
  parser=factory.newSAXParser();
  XMLReader xmlReader=parser.getXMLReader();
  //实例化handler，事件处理器
  SAXPraserHelper helperHandler=new SAXPraserHelper();
  //解析器注册事件
  xmlReader.setContentHandler(helperHandler);
  //读取文件流
  InputStream stream=getResources().openRawResource(R.raw.channels);
  InputSource is=new InputSource(stream);
  //解析文件
  xmlReader.parse(is);
  return helperHandler.getList();
}

private List<Map<String, String>> getData() {
  List<Map<String, String>> list = new ArrayList<Map<String, String>>();
  XmlResourceParser xrp = getResources().getXml(R.xml.channels);
  try {
  // 直到文档的结尾处
  while (xrp.getEventType() != XmlResourceParser.END_DOCUMENT) {
   // 如果遇到了开始标签
   if (xrp.getEventType() == XmlResourceParser.START_TAG) {
   String tagName = xrp.getName();// 获取标签的名字
   if (tagName.equals("item")) {
    Map<String, String> map = new HashMap<String, String>();
    String id = xrp.getAttributeValue(null, "id");// 通过属性名来获取属性值
    map.put("id", id);
    String url = xrp.getAttributeValue(1);// 通过属性索引来获取属性值
    map.put("url", url);
    map.put("name", xrp.nextText());
    list.add(map);
   }
   }
   xrp.next();// 获取解析下一个事件
  }
  } catch (XmlPullParserException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  }
  return list;
}

public static List<channel> getChannelList(InputStream stream)
{
  List<channel> list=new ArrayList<channel>();
  //得到 DocumentBuilderFactory 对象, 由该对象可以得到 DocumentBuilder 对象
  DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
  try {
  //得到DocumentBuilder对象
  DocumentBuilder builder=factory.newDocumentBuilder();
  //得到代表整个xml的Document对象
  Document document=builder.parse(stream);
  //得到 "根节点" 
  Element root=document.getDocumentElement();
  //获取根节点的所有items的节点
  NodeList items=root.getElementsByTagName("item"); 
  //遍历所有节点
  for(int i=0;i<items.getLength();i++)
  {
   channel chann=new channel();
   Element item=(Element)items.item(i);
   chann.setId(item.getAttribute("id"));
   chann.setUrl(item.getAttribute("url"));
   chann.setName(item.getFirstChild().getNodeValue());
   list.add(chann);
  }
  } catch (ParserConfigurationException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (SAXException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
  }
  return list;
}