Pull 解析/生成 XML文档

//1.Person.java

public class Person {
	private Integer id;
	private String name;
	private short age;
	
	public Person() {
		super();
	}
	public Person(String name,short age) {
		super();
		this.name = name;
		this.age = age;
	}
	public Person(Integer id,String name,short age) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
	}
	// getter and setter ...
}

public class PullParseService {
	/** Pull 解析Xml文档 */
	public static List<Person> getPersons(InputStream is) throws Exception{
		List<Person> persons = null;
		Person person = null;
		
		 XmlPullParser pullParser = Xml.newPullParser();
		 pullParser.setInput(is,"UTF-8");
		 
		 int eventType = pullParser.getEventType();
		 while(eventType!=XmlPullParser.END_DOCUMENT){
			 switch(eventType){
			 case XmlPullParser.START_DOCUMENT:
				 persons = new ArrayList<Person>();
				 
				 break;
			 case XmlPullParser.START_TAG:
				 if("person".equals(pullParser.getName())){
					 int id = Integer.valueOf(pullParser.getAttributeValue(0));
					 person = new Person();
					 person.setId(id);
				 }
				 if(person != null){
					 if("name".equals(pullParser.getName())){
						 person.setName(pullParser.nextText());
					 }
					 if("age".equals(pullParser.getName())){
						 person.setAge(new Short(pullParser.nextText()));
					 }
				 }
				 
				 break;
			 case XmlPullParser.END_TAG:
				 if("person".equals(pullParser.getName())){
					 persons.add(person);
					 person = null;
				 }
				 
				 break;
			 }
			 
			 eventType = pullParser.next();
		 }
		
		return persons;
	}
}

public class SAXParserTest extends AndroidTestCase {
	private static final String TAG = "SAXParserTest";
	
	public void testPullGetPerson() throws Throwable{
		InputStream is = this.getClass().getClassLoader().getResourceAsStream("person.xml");
		List<Person> persons = PullParseService.getPersons(is);
		String text = "";
		for(Person p:persons){
			text = text + "ID: "+p.getId()+" Name: "+p.getName()+" Age: "+p.getAge()+"n";
		}
		Log.i(TAG,text);
	}
}

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		TextView main = (TextView) findViewById(R.id.main_content);
		
		InputStream is = MainActivity.class.getClassLoader().getResourceAsStream("person.xml");
		try {
			List<Person> persons = testPull(is);
			String text = "Pull ";
			for(Person p:persons){
				text = text + "ID: "+p.getId()+" Name: "+p.getName()+" Age: "+p.getAge()+"n";
			}
			main.setText(text);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private List<Person> testPull(InputStream is) throws Exception{
		return DomParserService.getPersons(is);
	}
	
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.gzu.xmlparsertest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <uses-library android:name="android.test.runner" />
        
        <activity
            android:name="cn.gzu.xmlparsertest.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    
    <instrumentation android:name="android.test.InstrumentationTestRunner"
        android:targetPackage="cn.gzu.xmlparsertest" />

</manifest>

//7.xml生成方法（PullParseService.java中）
/** Pull 保存Xml文档 */

public static void save(List<Person> persons,OutputStream os) throws Exception{
		XmlSerializer xSerializer = Xml.newSerializer();
		xSerializer.setOutput(os,"UTF-8");
		xSerializer.startDocument("UTF-8",true);
		xSerializer.startTag(null,"persons");
		
		for(Person person : persons){
			xSerializer.startTag(null,"person");
			xSerializer.attribute(null,"id",person.getId().toString());
			
			xSerializer.startTag(null,"name");
			xSerializer.text(person.getName());
			xSerializer.endTag(null,"name");
			
			xSerializer.startTag(null,"age");
			xSerializer.text(String.valueOf(person.getAge()));
			xSerializer.endTag(null,"age");
			
			xSerializer.endTag(null,"person");
		}
		
		xSerializer.endTag(null,"persons");
		xSerializer.endDocument();
		
		os.flush();
		os.close();
	}

（编辑：李大同）

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