布局文件：

<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >
<Button 
        android:id="@+id/btn_pull"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="读取"/>
 <Button
        android:id="@+id/btn_cpull"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/btn_pull"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/btn_pull"
        android:layout_marginTop="28dp"
        android:text="生成" />
</RelativeLayout>

private Integer id;
private String name;
private Short age;

public class PullXmlService {
	public Person currentPerson;

	// 声明返回值
	public List<Person> readXML(InputStream is) {
		List<Person> persons = null;
		// 首先利用XML.newPullParser()获取解析对象
		XmlPullParser xmlPullParser = Xml.newPullParser();
		try {// 解析文件
			xmlPullParser.setInput(is,"UTF-8");
			// 获取解析的事件类型
			int eventType = xmlPullParser.getEventType();
			// 判断文件解析的是否完毕
			while (eventType != XmlPullParser.END_DOCUMENT) {
				switch (eventType) {
				case XmlPullParser.START_DOCUMENT:
					persons = new ArrayList<Person>();
					break;
				case XmlPullParser.START_TAG:
					String tagName = xmlPullParser.getName();
					Log.v("PullXmlService",tagName + "------");
					// 当解析的标签是person时
					if ("person".equals(tagName)) {
						// 创建person对象
						currentPerson = new Person();
						// 设置id属性 需要进行转化
						currentPerson.setId(Integer.parseInt(xmlPullParser.getAttributeValue(null,"id")));
					} else if ("name".equals(tagName)) {
						currentPerson.setName(xmlPullParser.nextText());
					} else if ("age".equals(tagName)) {
						currentPerson.setAge(new Short(xmlPullParser.nextText()));
					}
					break;
				case XmlPullParser.END_TAG:
					if ("person".equals(xmlPullParser.getName()) && currentPerson != null) {
						// 把person对象添加到集合中
						persons.add(currentPerson);
						currentPerson = null;
					}
					break;
				}
				// 下一个标签标识
				eventType = xmlPullParser.next();
			}
			// 关闭流
			is.close();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		// 返回
		return persons;
	}

	/**
	 * 采用pull生成XML文件
	 * 
	 * @param persons
	 * @return
	 */
	public boolean write(List<Person> persons) {
		// 采用pull解析进行实现
		if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
			File sdCardDir = Environment.getExternalStorageDirectory();
			File file = new File(sdCardDir,"mycsdn.xml");
			Log.e("保存的路径是",sdCardDir+"/mysdk");
			XmlSerializer serializer = Xml.newSerializer();
			FileOutputStream fos = null;
			try {
				// 根据文件对象创建一个文件的输出流对象
				fos = new FileOutputStream(file);
				// 设置输出的流及编码
				serializer.setOutput(fos,"UTF-8");
				// 设置文件的开始
				serializer.startDocument("UTF-8",true);
				// persons标签开始
				serializer.startTag(null,"persons");
				for (Person person : persons) {
					serializer.startTag(null,"person");
					serializer.attribute("null","id",person.getId() + "");
					// 设置person标签的子标签 name
					serializer.startTag(null,"name");
					serializer.text(person.getName());
					serializer.endTag(null,"name");
					// 设置person标签的子标签的age
					serializer.startTag(null,"age");
					serializer.text(person.getAge() + "");
					serializer.endTag(null,"age");
					// person标签的结束
					serializer.endTag(null,"person");
				}
				serializer.endTag(null,"persons");
				serializer.endDocument();
				fos.flush();
				fos.close();
				return true;
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		return false;
	}
}

public class MainActivity extends Activity {
	// pull解析器业务对象
	public PullXmlService pullXmlService;
	public Button btn_pull,btn_cpull;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// 设置显示的视图
		setContentView(R.layout.activity_main);
		pullXmlService = new PullXmlService();
		// 首先获取按钮组件对象
		btn_pull = (Button) findViewById(R.id.btn_pull);
		btn_cpull = (Button) findViewById(R.id.btn_cpull);
		// 注册事件
		btn_pull.setOnClickListener(new MyOnClickListener());

		btn_cpull.setOnClickListener(new MyOnClickListener());
	}


	class MyOnClickListener implements View.OnClickListener {
		@Override
		public void onClick(View v) {

			int id = v.getId();
			switch (id) {
			case R.id.btn_pull:
				List<Person> persons = null;
				try {
					persons = pullXmlService.readXML(getAssets().open("csdn.xml"));
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				if (persons != null) {
					Toast.makeText(MainActivity.this,"采用pull解析xml文件" + persons.get(0).getName() + "--" + persons.get(1).getName(),Toast.LENGTH_LONG).show();
				}
				break;
			case R.id.btn_cpull:
				try {
					List<Person> persons1 = pullXmlService.readXML(getAssets().open("csdn.xml"));
					// 重新生成一个xml文件 mycsdn.xml
					boolean flag = pullXmlService.write(persons1);
					if (flag) {
						Toast.makeText(MainActivity.this,"采用pull解析生产xml文件成功",Toast.LENGTH_LONG).show();
					} else {
						Toast.makeText(MainActivity.this,"采用pull解析生产xml文件失败",Toast.LENGTH_LONG).show();
					}
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				break;
			default:
				break;
			}
		}

	}

}