<?xml version="1.0" encoding="utf-8"?>
<apps>
  <app>
    <id>1</id>
    <name>Google Maps</name>
    <version>1.0</version>
  </app>
  <app>
    <id>2</id>
    <name>Chrome</name>
    <version>2.1</version>
  </app>
  <app>
    <id>3</id>
    <name>Google play</name>
    <version>2.3</version>
  </app>
</apps>

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    try {
      //获取XML文件的输入流
      InputStream fis = getResources().getAssets().open("data.xml");
      InputStreamReader isr = new InputStreamReader(fis, "UTF-8");
      StringBuffer stringBuffer = new StringBuffer();
      int mark = -1;
      while ((mark = isr.read()) != -1) {
        stringBuffer.append((char) mark);
      }
      String data = stringBuffer.toString();
      //把整个文件内容以String方式传入
      //parseXMLWithPull(data);
      //parseXMLWithSAX(data);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
XmlPullParser xmlPullParser = factory.newPullParser();

xmlPullParser.setInput(new StringReader(xmlData));

switch ( xmlPullParser.getEventType() )

  private void parseXMLWithPull(String xmlData) {
    try {
      XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
      XmlPullParser xmlPullParser = factory.newPullParser();
      xmlPullParser.setInput(new StringReader(xmlData));
      int eventType = xmlPullParser.getEventType();
      String id = "";
      String name = "";
      String version = "";
      while (eventType != xmlPullParser.END_DOCUMENT) {
        String nodeName = xmlPullParser.getName();
        switch (eventType) {
          //开始解析某个节点
          case XmlPullParser.START_TAG: {
            if ("id".equals(nodeName)) {
              id = xmlPullParser.nextText();
            } else if ("name".equals(nodeName)) {
              name = xmlPullParser.nextText();
            } else if ("version".equals(nodeName)) {
              version = xmlPullParser.nextText();
            }
          }
          break;
          //完成解析某个节点
          case XmlPullParser.END_TAG: {
            if ("app".equals(nodeName)) {
              Log.d("woider", "id is " + id);
              Log.d("woider", "name is " + name);
              Log.d("woider", "version is " + version);
            }
          }
          break;
        }
        eventType = xmlPullParser.next();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

public class ContentHandler extends DefaultHandler {
  private String nodeName;
  private StringBuilder id;
  private StringBuilder name;
  private StringBuilder version;
  @Override
  public void startDocument() throws SAXException {
    id = new StringBuilder();
    name = new StringBuilder();
    version = new StringBuilder();
  }
  @Override
  public void startElement(String uri, String localName, String qName, Attributes attributes)
      throws SAXException {
    //记住当前结点名
    nodeName = localName;
  }
  @Override
  public void characters(char[] ch, int start, int length) throws SAXException {
    //进行格式规范化
    String str = new String(ch, start, length).trim();
    //根据当前节点名添加内容
    if ("id".equals(nodeName)) {
      id.append(str);
    } else if ("name".equals(nodeName)) {
      name.append(str);
    } else if ("version".equals(nodeName)) {
      version.append(str);
    }
  }
  @Override
  public void endElement(String uri, String localName, String qName) throws SAXException {
    if ("app".equals(localName)) {
      Log.d("woider", "id is " + id);
      Log.d("woider", "name is " + name);
      Log.d("woider", "version is " + version);
      //清空StringBuilder
      id.setLength(0);
      name.setLength(0);
      version.setLength(0);
    }
  }
  @Override
  public void endDocument() throws SAXException {
  }
}

SAXParserFactory factory = SAXParserFactory.newInstance();
XMLReader xmlReader = factory.newSAXParser().getXMLReader();

ContentHandler handler = new ContentHandler();
xmlReader.setContentHandler(handler);

xmlReader.parse(new InputSource(new StringReader(xmlData)));

  private void parseXMLWithSAX(String xmlData) {
    try {
      SAXParserFactory factory = SAXParserFactory.newInstance();
      XMLReader xmlReader = factory.newSAXParser().getXMLReader();
      ContentHandler handler = new ContentHandler();
      //将ContentHandler的实例设置到XMLReader中
      xmlReader.setContentHandler(handler);
      //开始执行解析
      xmlReader.parse(new InputSource(new StringReader(xmlData)));
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();

handler = new ParserHandler();
InputStream inputStream = getResources().getAssets().open("data.xml");

parser.parse(inputStream, handler);