android 通过pull解析xml文件

package com.example.xmldemo.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

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

import com.example.xmldemo.Person;

import android.os.Environment;
import android.test.AndroidTestCase;
import android.util.Log;
import android.util.Xml;

public class XmlTest extends AndroidTestCase
{    
    public void test()
    {
        writeLocal();
        
        List<Person> personList = parseXml();
        for(Person person : personList)
        {
            Log.i("XmlTest", person.toString());
        }
    }
    /**
     * 写xml文件大本地
     */
    public void writeLocal()
    {
        List<Person> personList = getPersonList();
        //获得序列化对象
        XmlSerializer serializer = Xml.newSerializer();
        // 
        try
        {
            //创建文件流对象
            File file = new File("data/data/com.example.xmldemo", "persons.xml");
            FileOutputStream fos = new FileOutputStream(file);
            //设置文件的输出流
            serializer.setOutput(fos, "UTF-8");
            serializer.startDocument("utf-8", true); //<?xml version
            serializer.startTag(null, "persons"); //<persons>
            for(Person person : personList)
            {
                serializer.startTag(null, "person"); //<person>
                serializer.attribute(null, "id", String.valueOf(person.getId()));
                serializer.startTag(null, "name"); //<name>
                serializer.text(person.getName()); // kite1
                serializer.endTag(null, "name"); //</name>
                serializer.startTag(null, "age"); //<age>
                serializer.text(String.valueOf(person.getAge()));
                serializer.endTag(null, "age");//</age>
                serializer.endTag(null, "person"); //<person>
            }
            serializer.endTag(null, "persons"); //</persons>
            serializer.endDocument();
            serializer.flush();
            fos.flush();
            fos.close();
        } catch (Exception e)
        {
            e.printStackTrace();
        }
        
    }
    /**
     * 获得personList
     * @return
     */
    public List<Person> getPersonList()
    {
        List<Person> personList = new ArrayList<Person>();
        for(int i = 0; i < 30; i++)
        {
            Person person = new Person(i, "kite" + 1,18 + i);
            personList.add(person);
        }
        return personList;
    }
    
    public List<Person> parseXml()
    {
    
        try
        {
            //创建文件流对象
            File file = new File("data/data/com.example.xmldemo", "persons.xml");
            FileInputStream fis = new FileInputStream(file);
            //获得pull 解析对象
            XmlPullParser parser = Xml.newPullParser();
            // 指定解析的文件和编码格式
            parser.setInput(fis,"utf-8");
            int eventType = parser.getEventType(); //获得事件的类型
            
            //初始化集合
            List<Person> personList = null;
            Person person = null;
            //如果不是最后的endDocument
            while(eventType != XmlPullParser.END_DOCUMENT)
            {
                String tagName = parser.getName();
                switch (eventType)
                {
                case XmlPullParser.START_TAG:
                        //如果是最开始的persons 根节点初始化
                        if("persons".equals(tagName))
                        {
                            personList = new ArrayList<Person>();
                        } else if("person".equals(tagName))
                        {
                            //初始化person对象
                            person = new Person();
                            
                            //获得id
                            String id =  parser.getAttributeValue(null, "id");
                            person.setId(Integer.parseInt(id));
                        } else if("name".equals(tagName))
                        {
                            person.setName(parser.nextText());
                        } else if("age".equals(tagName))
                        {
                            person.setAge(Integer.parseInt(parser.nextText()));
                        }
                    break;
                case XmlPullParser.END_TAG:
                    //如果是结束标记
                    if("person".equals(tagName))
                    {
                        // 需要把上面设置好值的person对象添加到集合中
                        personList.add(person);
                    } 
                    break;
                default:    
                    break;
                }
                //获得下一个事件
                eventType = parser.next();
            }
            return personList;
        } catch (Exception e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
    
}