采用PULL解析XML

/*
	 * 读取
	 */
	public void testReadPull() throws ParserConfigurationException,
			SAXException, IOException, XmlPullParserException
	{

		PullXml sax = new PullXml();
		InputStream inStream = this.getClass().getClassLoader()
				.getResourceAsStream("secn.xml");
		List<Person> persons = sax.domParser(inStream);
		for (Person person : persons)
		{
			Log.i("SaxTest", String.valueOf(person.getName()));
		}
	}

	/*
	 * 保存
	 */
	public void testReadPullSave() throws ParserConfigurationException,
			SAXException, IOException, XmlPullParserException
	{

		FileOutputStream fos = this.getContext().openFileOutput("pull.xml", Context.MODE_APPEND);
		List<Person> persons = new ArrayList<Person>();
		persons.add(new Person(1,"xiaoli",(short)12));
		persons.add(new Person(1,"xiaoli",(short)12));
		persons.add(new Person(1,"xiaoli",(short)12));
		persons.add(new Person(1,"xiaoli",(short)12));
		persons.add(new Person(1,"xiaoli",(short)12));
		
		PullXml sax = new PullXml();
		sax.save(persons, fos);
		
		
	}
 /**
	 * 
	 * @param persons 集合
	 * @param outStream　要输出到的地方
	 * @throws IllegalArgumentException
	 * @throws IllegalStateException
	 * @throws IOException
	 */
	public void save(List<Person> persons,OutputStream outStream) throws IllegalArgumentException, IllegalStateException, IOException{
		XmlSerializer serializer = Xml.newSerializer();
		serializer.setOutput(outStream, "utf-8");
		serializer.startDocument("utf-8", true);
		
		serializer.startTag(null, "persons");
		for(Person person:persons){
			serializer.startTag(null, "person");
			serializer.attribute(null, "id", String.valueOf(person.getId()));
			
			serializer.startTag(null, "name");
			serializer.text(person.getName());
			serializer.endTag(null, "name");
			
			serializer.startTag(null, "age");
			serializer.text(String.valueOf(person.getAge()));
			serializer.endTag(null, "age");
			
			serializer.endTag(null, "person");
		}
		serializer.endTag(null, "persons");
		serializer.endDocument();
		outStream.flush();
		outStream.close();
	}
	
	/**
	 * 解析后并返回一个对象集合
	 * 
	 * @param inStream
	 *            xml输入流
	 * @return 解析后并返回一个对象集合
	 * @throws ParserConfigurationException
	 * @throws SAXException
	 * @throws IOException
	 * @throws XmlPullParserException
	 */
	@SuppressWarnings("static-access")
	public List<Person> domParser(InputStream inStream) throws ParserConfigurationException, SAXException, IOException, XmlPullParserException
	{
		List<Person> persons = null;
		Person person = null;
		XmlPullParserFactory pullFactory = XmlPullParserFactory.newInstance();
		XmlPullParser pullPerser = pullFactory.newPullParser();
		pullPerser.setInput(inStream, "utf-8");
		int eventType = pullPerser.getEventType();
		while(eventType != XmlPullParser.END_DOCUMENT){
			switch (eventType) {
			case XmlPullParser.START_DOCUMENT:
				persons = new ArrayList<Person>();
				break;
			case XmlPullParser.START_TAG:
				if("person".equals(pullPerser.getName())){
					person = new Person();
					person.setId(new Integer(pullPerser.getAttributeValue(0)));
				}
				if("name".equals(pullPerser.getName())){
					person.setName(pullPerser.nextText());
				}else if("age".equals(pullPerser.getName())){
					person.setAge(new Short(pullPerser.nextText()));
				}
				
				break;
			case XmlPullParser.END_TAG:
				if("person".equals(pullPerser.getName())){
					persons.add(person);
				}
				break;
			}
			eventType = pullPerser.next();
		}
		return persons;
	}