利用Pull生成和解析xml文件

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解析xml的方式有很多，可以用dom,sax解析，但是在android平台上最常用是Pull解析，下面是简单的示例

<?xmlversion="1.0" encoding="UTF-8"?>
<persons>
  <person id=“18">
  <name>allen</name>
  <age>36</age>
  </person>
  <person id=“28">
  <name>james</name>
  <age>25</age>
  </person>
</persons>

public class Person {
	private Integer id;
	private String name;
	private Short age;
	
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Short getAge() {
		return age;
	}
	public void setAge(Short age) {
		this.age = age;
	}	
}

public static String writeXML(List<Person> persons, Writer writer){
    XmlSerializer serializer = Xml.newSerializer();
    try {
        serializer.setOutput(writer);
        serializer.startDocument("UTF-8", true);
        //第一个参数为命名空间,如果不使用命名空间,可以设置为null
        serializer.startTag("", "persons");
        for (Person person : persons){
            serializer.startTag("", "person");
            serializer.attribute("", "id", person.getId().toString());
            serializer.startTag("", "name");
            serializer.text(person.getName());
            serializer.endTag("", "name");
            serializer.startTag("", "age");
            serializer.text(person.getAge().toString());
            serializer.endTag("", "age");
            serializer.endTag("", "person");
        }
        serializer.endTag("", "persons");
        serializer.endDocument();
        return writer.toString();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

public static List<Person> readXML(InputStream inStream) {
	XmlPullParser parser = Xml.newPullParser();
	try {
	parser.setInput(inStream, "UTF-8");
	int eventType = parser.getEventType();
	Person currentPerson = null;
	List<Person> persons = null;
	while (eventType != XmlPullParser.END_DOCUMENT) {
		switch (eventType) {
		case XmlPullParser.START_DOCUMENT://文档开始事件,可以进行数据初始化处理
			persons = new ArrayList<Person>();
			break;
		case XmlPullParser.START_TAG://开始元素事件
			String name = parser.getName();
			if (name.equalsIgnoreCase("person")) {
				currentPerson = new Person();
				currentPerson.setId(new Integer(parser.getAttributeValue(null, "id")));
			} else if (currentPerson != null) {
				if (name.equalsIgnoreCase("name")) {
					currentPerson.setName(parser.nextText());// 如果后面是Text节点,即返回它的值
				} else if (name.equalsIgnoreCase("age")) {
					currentPerson.setAge(new Short(parser.nextText()));
				}
			}
			break;
		case XmlPullParser.END_TAG://结束元素事件
			if (parser.getName().equalsIgnoreCase("person") && currentPerson != null) {
				persons.add(currentPerson);
				currentPerson = null;
			}
			break;
		}
		eventType = parser.next();
	}
	inStream.close();
	return persons;
	} catch (Exception e) {
		e.printStackTrace();
	}
	return null;
}

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利用Pull生成和解析xml文件

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原文地址：http://blog.csdn.net/qq_21413973/article/details/51345877