编写XML文件

package com.example.day13_xml;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlSerializer;

import com.example.bean.Person;

import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.util.Xml;
import android.view.Menu;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

List<Person> list=new ArrayList<Person>();

for (int i = 0; i < 10; i++) {
list.add(new Person("张三"+i,i+""));
}

//得到一个序列化

XmlSerializer serializer = Xml.newSerializer();

//创建文件

File file=new File(Environment.getExternalStorageDirectory(), "person.xml");
try {
//写入流
FileOutputStream outputStream = new FileOutputStream(file);
serializer.setOutput(outputStream, "utf-8");

serializer.startDocument("utf-8", true);
serializer.startTag(null, "persons");
for (int i = 0; i < list.size(); i++) {

serializer.startTag(null, "person");

serializer.startTag(null, "name");
serializer.text(list.get(i).getName());
serializer.endTag(null, "name");

serializer.startTag(null, "age");
serializer.text(list.get(i).getAge());
serializer.endTag(null, "age");

serializer.endTag(null, "person");

}
serializer.endTag(null, "persons");
serializer.endDocument();

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}