Android如何使用Pull解析器解析xml文件

public class Person {
 private String personId;
 private String name;
 private String address;
 private String tel;
 private String fax;
 private String email;

 public String getPersonId() {
  return personId;
 }

 public void setPersonId(String personId) {
  this.personId = personId;
 }

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public String getAddress() {
  return address;
 }

 public void setAddress(String address) {
  this.address = address;
 }

 public String getTel() {
  return tel;
 }

 public void setTel(String tel) {
  this.tel = tel;
 }

 public String getFax() {
  return fax;
 }

 public void setFax(String fax) {
  this.fax = fax;
 }

 public String getEmail() {
  return email;
 }

 public void setEmail(String email) {
  this.email = email;
 }

 @Override
 public String toString() {
  return "Person [personId=" + personId + ", name=" + name + ", address="
    + address + ", tel=" + tel + ", fax=" + fax + ", email="
    + email + "]";
 }
}

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.SAXException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import android.app.Activity;
import android.os.Bundle;
import android.util.Xml;
import android.view.View;
import android.widget.Toast;

public class PullActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    public void pull(View v){
     pullParse(); 
    }

    public void pullParse(){
     List persons = null;
     Person person = null;
     InputStream in = null;
     try {
      XmlPullParser pullParser = Xml.newPullParser();
      in = getAssets().open("person.xml");
   pullParser.setInput(in, "utf-8");
   int eventType = pullParser.getEventType();
   while(eventType != XmlPullParser.END_DOCUMENT){
    String qName = pullParser.getName();
    switch(eventType){
    case XmlPullParser.START_DOCUMENT:
     persons = new ArrayList();
     break;
    case XmlPullParser.START_TAG:
     if("person".equalsIgnoreCase(qName)){
      person = new Person();
      person.setPersonId(pullParser.getAttributeValue(null, "personid"));
     }else if("name".equalsIgnoreCase(qName)){
      person.setName(pullParser.nextText());
     }else if("address".equalsIgnoreCase(qName)){
      person.setAddress(pullParser.nextText());
     }else if("tel".equalsIgnoreCase(qName)){
      person.setTel(pullParser.nextText());
     }else if("fax".equalsIgnoreCase(qName)){
      person.setFax(pullParser.nextText());
     }else if("email".equalsIgnoreCase(qName)){
      person.setEmail(pullParser.nextText());
     }
     break;
    case XmlPullParser.END_TAG:
     if("person".equalsIgnoreCase(qName)){
      persons.add(person);
     }
     break;
    }
    eventType = pullParser.next();
   }
   in.close();
  } catch (XmlPullParserException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }

     for (Person person2 : persons) {
   Toast.makeText(this, person2.toString(), Toast.LENGTH_SHORT).show();
  }
    }
}

            android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="pull"
        android:text="pull" />