创建实体bean类：

package com.example.xmltest.entity;

public class Person {

	private Integer id;

	private String name;

	private Integer age;

	public Person() {
		super();
	}

	public Person(Integer id,String name,Integer age) {
		super();
		this.id = id;
		this.name = name;
		this.age = 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 Integer getAge() {
		return age;
	}

	public void setAge(Integer age) {
		this.age = age;
	}

	@Override
	public String toString() {
		return "Person [id=" + id + ",name=" + name + ",age=" + age + "]";
	}

}

package com.example.xmltest.utils;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;

import android.util.Log;
import android.util.Xml;

import com.example.xmltest.entity.Person;

public class XmlUtils {

	private static final String TAG = "XmlUtils";

	/**
	 * 
	 * 将数据以xml形式写入到本地
	 * 
	 * @throws Exception
	 */

	public void writeToLocal() throws Exception {

		List<Person> personList = new ArrayList<Person>();

		for (int i = 0; i < 30; i++) {

			personList.add(new Person(i,"王" + i,20 + i));

		}

		XmlSerializer serializer = Xml.newSerializer();// 创建 XmlSerializer对象

		FileOutputStream fos = new FileOutputStream("/mnt/sdcard/person.xml");

		// 指定序列化对象输出的流
		serializer.setOutput(fos,"utf-8");
		// 写xml的头
		serializer.startDocument("utf-8",true);// true为yes-----> xml文件中无DTD约束。

		// 开始的根节点
		serializer.startTag(null,"persons");

		for (Person person : personList) {

			serializer.startTag(null,"person");

			serializer.attribute(null,"id",String.valueOf(person.getId()));

			// 写人的姓名
			serializer.startTag(null,"name");
			serializer.text(person.getName());
			serializer.endTag(null,"name");

			// 写人的年龄
			serializer.startTag(null,"age");
			serializer.text(String.valueOf(person.getAge()));
			serializer.endTag(null,"age");

			serializer.endTag(null,"person");
		}

		serializer.endTag(null,"persons");// 不用写“/”

		// 标记xml文件输出完毕
		serializer.endDocument();

	}

	/**
	 * 
	 * 从本地解析xml数据
	 * 
	 * @throws Exception
	 * 
	 * 
	 */
	public void parserXmlFromLocal() throws Exception {

		// 创建pull解析器对象
		XmlPullParser parser = Xml.newPullParser();

		// 指定解析的文件
		FileInputStream fis = new FileInputStream("/mnt/sdcard/person.xml");
		parser.setInput(fis,"UTF-8");

		int eventType = parser.getEventType();// 获得解析器的第一个事件类型

		List<Person> personList = null;

		Person person = null;

		String name;
		String tagName = parser.getName();

		while (eventType != XmlPullParser.END_DOCUMENT) {// 如果事件类型不等于结束的类型，继续循环
			// 解析数据
			switch (eventType) {
			case XmlPullParser.START_TAG:// 代表开始节点<persons>

				if ("persons".equals(tagName)) {
					// 初始化集合
					personList = new ArrayList<Person>();
				} else if ("person".equals(tagName)) {

					person = new Person();

					person.setId(Integer.valueOf(parser.getAttributeValue(null,"id")));

				} else if ("name".equals(tagName)) {

					name = parser.nextText(); // 当前是<name>节点
												// nextText是取<name>后边的值
					person.setName(name);

				} else if ("age".equals(tagName)) {

					person.setAge(Integer.parseInt(parser.nextText()));

				}

				break;

			case XmlPullParser.END_TAG: // 代表结束节点</person>

				if ("person".equals(tagName)) {// 当前是</person>
					// 把上面person的对象添加到对象中
					personList.add(person);
				}

				break;

			default:
				break;
			}

			eventType = parser.next();// 赋值下一个事件类型

		}

		if (personList != null) {
			for (Person p : personList) {
				Log.i(TAG,p.toString());
				System.out.println(p.toString());
			}
		}

	}

}

package com.example.xmltest.utils;

import android.test.AndroidTestCase;

public class TestCase extends AndroidTestCase {
	
	
	public void test() throws Exception{
		
		XmlUtils xmlUtils = new XmlUtils();
		
		xmlUtils.writeToLocal();
		
		
		xmlUtils.parserXmlFromLocal();
		
		
		
	}
	
	
	

}

因为用到测试方法，所以需要引入测试框架，另外需要假如写sd卡的权限。