package com.android10;
public class Person {
String pName ;
String pAge  ;
public String getpName() {
return pName;
}
public void setpName(String pName) {
this.pName = pName;
}
public String getpAge() {
return pAge;
}
public void setpAge(String pAge) {
this.pAge = pAge;
}
}

package com.android10;
public class Product {
private String name ;
private String age  ;
private Person person ;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public Person getPerson() {
return person;
}
public void setPerson(Person person) {
this.person = person;
}
}

package com.android10;
import java.util.List;
public class ListBean {
private List<Product> root ;
public List<Product> getRoot() {
return root;
}
public void setRoot(List<Product> root) {
this.root = root;
}
}

package com.android10;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.List;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.stream.StreamResult;
import org.xml.sax.InputSource;
import android.app.Activity;
import android.os.Bundle;
import com.thoughtworks.xstream.XStream;
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState)  {
super.onCreate(savedInstanceState);
setContentView( R.layout.activity_main );
XStream xstream = new XStream() ;
List<Product> root = getList() ;
//将ListBean中的集合设置空元素，即不显示集合元素标签
xstream.addImplicitCollection( ListBean.class, "root");
xstream.autodetectAnnotations(true);
//设置别名
xstream.alias( "product", Product.class );
//将name设置为父类（Student）的元素的属性
xstream.useAttributeFor( Product.class, "name" );
//把list集合转换成Xml字符串
String xmlString =  xstream.toXML(  root ) ;
//把Xml字符串写入SD卡Xml文件
XstreamUtil xstreamUtil = new XstreamUtil() ;
xstreamUtil.writeToXml( this ,  xmlString ) ;
//把Xml字符串转化成list集合
List<Product> list = new ArrayList<Product>() ;
list =  (List<Product>) xstream.fromXML( xmlString ) ;
System.out.println("sss"+  formatXml( xmlString ) );
}
/**
* 得到数据
* @return
*/
private List<Product>  getList(){
Person person1 = new Person() ;
person1.setpName( "saliy" ) ;
person1.setpAge( "36" );
Product product1 = new Product() ;
product1.setName( "jhon" ) ;
product1.setAge( "30" );
product1.setPerson( person1 );
Person person2 = new Person() ;
person2.setpName( "saliy02" ) ;
person2.setpAge( "3602" );
Product product2 = new Product() ;
product2.setName( "jhon02" ) ;
product2.setAge( "3002" );
product2.setPerson( person2 );
List<Product> root = new ArrayList<Product>() ;
root.add( product1 ) ;
root.add( product2 ) ;
return root ;
}
/**
* 格式化XML字符串
* @param xml
* @return
*/
public static String formatXml(String xml){
try{
Transformer serializer= SAXTransformerFactory.newInstance().newTransformer();
serializer.setOutputProperty(OutputKeys.INDENT, "yes");
serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
Source xmlSource=new SAXSource(new InputSource(new ByteArrayInputStream(xml.getBytes())));
StreamResult res =  new StreamResult(new ByteArrayOutputStream());
serializer.transform(xmlSource, res);
return new String(((ByteArrayOutputStream)res.getOutputStream()).toByteArray());
}catch(Exception e){
return xml;
}
}
}

package com.android10;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import android.content.Context;
import android.os.Environment;
public class XstreamUtil {
XcallBack xcallBack ;
/**
* 把xml字符串写入ＳＤ卡文件
* @param context
* @param str　　xml字符串
*/
public void writeToXml(Context context, String str ){
//获取文件路径
String SDPATH = Environment.getExternalStorageDirectory()  + "/myfile1.xml/" ;
//创建文件
File file = new File( SDPATH ) ;
if( !file.exists() ){
try {
file.createNewFile() ;
} catch (IOException e) {
e.printStackTrace();
}
}
//写入数据
try {
FileOutputStream out = new FileOutputStream( file ) ;
OutputStreamWriter outw = new OutputStreamWriter(out);
try {
outw.write(str);
outw.close();
out.close();
if( xcallBack != null ){
xcallBack.success();
}
} catch (IOException e) {
if( xcallBack != null ){
xcallBack.fail();
}
}
} catch (FileNotFoundException e1) {
e1.printStackTrace();
if( xcallBack != null ){
xcallBack.fail();
}
}
}
//设置监听器
void setXStreamLister( XcallBack xcallBack ){
this.xcallBack = xcallBack ;
}
}
interface XcallBack{
/**
* 写入成功
*/
void success() ;
/**
* 写入失败
*/
void fail() ;
}