Android pull解析xml的实现方法

<?xml version="1.0" encoding="utf-8" standalone="yes" ?   
<persons  
  <person id="101"  
    <name jame</name   
    <age 18</age   
  </person  
  <person id="102"  
    <name Tom</name   
    <age 20</age   
  </person  
  <person id="103"  
    <name Jack</name   
    <age 16</age   
  </person  
  <person id="104"  
    <name Rose</name   
    <age 26</age   
  </person  
</persons  

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:orientation="vertical" 
  tools:context="${relativePackage}.${activityClass}"   
 
  <TextView 
    android:id="@+id/tv_content" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@string/hello_world" /  
 
  <Button 
    android:id="@+id/bt_read" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="读取xml文件" /  
 
</LinearLayout  

public class Person { 
  private int id; 
  private String name; 
  private int age; 
 
  public Person() { 
    super(); 
  } 
 
  public Person(int id, String name, int age) { 
    super(); 
    this.id = id; 
    this.name = name; 
    this.age = age; 
  } 
 
  public int getId() { 
    return id; 
  } 
 
  public void setId(int id) { 
    this.id = id; 
  } 
 
  public String getName() { 
    return name; 
  } 
 
  public void setName(String name) { 
    this.name = name; 
  } 
 
  public int getAge() { 
    return age; 
  } 
 
  public void setAge(int age) { 
    this.age = age; 
  } 
 
  @Override 
  public String toString() { 
    return "Person [id=" + id + ", name=" + name + ", age=" + age + "]"; 
  } 
 
} 

import java.io.File; 
import java.io.FileInputStream; 
import java.io.InputStream; 
import java.util.ArrayList; 
import java.util.List; 
import org.xmlpull.v1.XmlPullParser; 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.Environment; 
import android.util.Xml; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.TextView; 
public class MainActivity extends Activity implements OnClickListener { 
private TextView tv_content; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
tv_content = (TextView) findViewById(R.id.tv_content); 
findViewById(R.id.bt_read).setOnClickListener(this); 
} 
@Override 
public void onClick(View v) { 
try { 
if (Environment.getExternalStorageState().equals( 
Environment.MEDIA_MOUNTED)) { 
List<Person  persons = new ArrayList<Person (); 
Person person = null; 
File sd_file = Environment.getExternalStorageDirectory(); 
File file = new File(sd_file, "persons.xml"); 
InputStream inputStream = new FileInputStream(file); 
// 获取xml Pull解析器 
XmlPullParser pullParser = Xml.newPullParser(); 
// 解析文件 
pullParser.setInput(inputStream, "utf-8"); 
// 得到事件类型（START_DOCUMENT,END_DOCUMENT,START_TAG, END_TAG, TEXT, 
// etc） 
int eventType = pullParser.getEventType(); 
while (eventType != XmlPullParser.END_DOCUMENT) { 
switch (eventType) { 
case XmlPullParser.START_TAG: 
// 获取标签的名称 
String tag_name = pullParser.getName(); 
if ("person".equals(tag_name)) { 
person = new Person(); 
persons.add(person); 
// String value = pullParser.getAttributeValue(null, 
// "id"); 
String value = pullParser.getAttributeValue(0); 
person.setId(Integer.parseInt(value)); 
} else if ("name".equals(tag_name)) { 
// pullParser.next(); 
// String text = pullParser.getText(); 
String text = pullParser.nextText(); 
person.setName(text); 
} else if ("age".equals(tag_name)) { 
// pullParser.next(); 
// String text = pullParser.getText(); 
String text = pullParser.nextText(); 
person.setAge(Integer.parseInt(text)); 
} 
break; 
default: 
break; 
} 
eventType = pullParser.next(); 
} 
tv_content.setText(persons.toString()); 
} 
} catch (Exception e) { 
e.printStackTrace(); 
} 
} 
}