1、使用XmlPullParser解析xml数据：

①pullParser.setInput(xml,"UTF-8");给pull解析器一个输入流数据。

②int eventType = pullParser.getEventType();获取当前事件类型。

③while (eventType != XmlPullParser.END_DOCUMENT) 比对当前事件类型是否为xml文档中的"END_DOCUMENT"，若“是”则结束解析。

eventType = pullParser.next();顺移当前解析器的指针。

④case XmlPullParser.START_TAG:当解析遇到元素的开始标识时，判断具体是哪个元素，获取所需的数据。

⑤case XmlPullParser.END_TAG:当解析遇到元素的结束标识时，判断是否为一个完整数据的结束标识，若“是”则打包一条数据。

	public static List<Person> getPersons(InputStream xml) throws Exception {
		List<Person> persons = null;
		Person person = null;
		XmlPullParser pullParser = Xml.newPullParser();
		pullParser.setInput(xml,"UTF-8");
		int eventType = pullParser.getEventType();
		while (eventType != XmlPullParser.END_DOCUMENT) {
			switch (eventType) {
			case XmlPullParser.START_DOCUMENT:
				persons = new ArrayList<Person>();
				break;
			case XmlPullParser.START_TAG:
				if ("person".equals(pullParser.getName())) {
					int id = Integer.parseInt(pullParser.getAttributeValue(0));
					person = new Person();
					person.setId(id);
				}
				if ("name".equals(pullParser.getName())) {
					String name = pullParser.nextText();
					person.setName(name);
				}
				if ("age".equals(pullParser.getName())) {
					int age = Integer.parseInt(pullParser.nextText());
					person.setAge(age);
				}
				break;

			case XmlPullParser.END_TAG:
				if ("person".equals(pullParser.getName())) {
					persons.add(person);
					person = null;
				}
				break;

			}
			eventType = pullParser.next();
		}
		return persons;
	}

①serializer.setOutput(outStream,"UTF-8");给序列化器一个输出流。

②根据所需xml数据格式开始序列化生成xml数据。

	public static void createXml(List<Person> persons,OutputStream outStream) throws Exception {
		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",person.getId().toString());
			
			serializer.startTag(null,"name");
			serializer.text(person.getName());
			serializer.endTag(null,"name");
			
			serializer.startTag(null,"age");
			serializer.text(person.getAge().toString());
			serializer.endTag(null,"age");
			
			serializer.endTag(null,"person");
		}
		serializer.endTag(null,"persons");
		serializer.endDocument();
		outStream.flush();
		outStream.close();
	}