今天将XmlPullParser类学习使用了下，将解析步骤放在Log记录中，发现log中如果有存储内容为null会有异常，于是在里面多加了“1”字符串，

发现解析xml要注意连个问题

1.获取<age>23</age>

要用pullparser.nextText(). //pullparser实例化得到的当前节点

2.event = pullparser.next() //很重要，他不会自动继续向下走

下面贴出处理顺序

	public List<Persion> getPersion(Reader in){
		//工厂类自己实例化
//		try {
//			XmlPullParser pullparser = XmlPullParserFactory.newInstance().newPullParser();
//		} catch (XmlPullParserException e) {
//			// TODO Auto-generated catch block
//			e.printStackTrace();
//		}
		XmlPullParser pullparser = Xml.newPullParser();//android 自带
		try {
			pullparser.setInput(in);
			int event = pullparser.getEventType();
			ArrayList<Persion> persons = null;
			Persion persion =null;
			if(event == pullparser.START_DOCUMENT){
				persons = new ArrayList<Persion>();
			}else {
				throw new Exception("no person");
			}
			int i=0;
			while(event !=XmlPullParser.END_DOCUMENT){  //判断是否读取到文档结尾
			switch(event){
				case XmlPullParser.START_TAG:
					if("person".equals(pullparser.getName())){
						persion = new Persion();
						persion.setId(Integer.parseInt(pullparser.getAttributeValue(0)));
					}else if("age".equals(pullparser.getName())){
						persion.setAge(Integer.valueOf(pullparser.nextText()));
					}else if("name".equals(pullparser.getName())){
						persion.setName(pullparser.nextText());
					}
				    break;
				case XmlPullParser.END_TAG:
					if("person".equals(pullparser.getName())){
						persons.add(persion);
					}
					break;
				}
			event = pullparser.next();
			Log.i("person",pullparser.getName()+"1");
			}
			return persons;
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		} //设置要解析的数据
		/*
		 * 先读到字符数组中，读到间括号，判断语法，只能自动解析第一段
		 */
		
	}

public class Test extends AndroidTestCase{
	public void xmlRead() throws Exception {
		InputStream fs =  this.getClass().getClassLoader().getResourceAsStream("persons.xml");
		Reader re = new InputStreamReader(fs);
		PersonService files = new PersonService();
		List<Persion> persons =files.getPersion(re);
		int i=0;
		for(Persion person:persons){
			Log.i("person"+i++,person.toString());
		}
}

<?xml version="1.0" encoding="UTF-8"?>
<persons>
	<person id="2">
		<age>23</age>
		<name>Tom</name>	
	</person>
	<person id="3">
		<age>21</age>
		<name>Toy</name>	
	</person>
</persons>

最后两个是测试文件显示