创建XML文件

生成的XML文件如下：

<?xml version='1.0' encoding='UTF-8' standalone='yes' ?>
<boxs>
	<users>
		<user_name>小白杨0</user_name>
		<user_number>010-888-0</user_number>
		<address>北京-海淀区-铸成大厦-0</address>
	</users>
	<users>
		<user_name>小白杨1</user_name>
		<user_number>010-888-1</user_number>
		<address>北京-海淀区-铸成大厦-1</address>
	</users>
	<users>
		<user_name>小白杨2</user_name>
		<user_number>010-888-2</user_number>
		<address>北京-海淀区-铸成大厦-2</address>
	</users>
	<users>
		<user_name>小白杨3</user_name>
		<user_number>010-888-3</user_number>
		<address>北京-海淀区-铸成大厦-3</address>
	</users>
	<users>
		<user_name>小白杨4</user_name>
		<user_number>010-888-4</user_number>
		<address>北京-海淀区-铸成大厦-4</address>
	</users>
	<users>
		<user_name>小白杨5</user_name>
		<user_number>010-888-5</user_number>
		<address>北京-海淀区-铸成大厦-5</address>
	</users>
	<users>
		<user_name>小白杨6</user_name>
		<user_number>010-888-6</user_number>
		<address>北京-海淀区-铸成大厦-6</address>
	</users>
	<users>
		<user_name>小白杨7</user_name>
		<user_number>010-888-7</user_number>
		<address>北京-海淀区-铸成大厦-7</address>
	</users>
	<users>
		<user_name>小白杨8</user_name>
		<user_number>010-888-8</user_number>
		<address>北京-海淀区-铸成大厦-8</address>
	</users>
	<users>
		<user_name>小白杨9</user_name>
		<user_number>010-888-9</user_number>
		<address>北京-海淀区-铸成大厦-9</address>
	</users>
</boxs>

CreateXmlActivity：

package com.amaker.xml;

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

import org.xmlpull.v1.XmlSerializer;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.util.Xml;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class CreateXmlActivity extends Activity {
	private static final String Task_PATH = "/sdcard/Boxs.xml";
	private TextView tv;
	private Button btn;
	private List<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		tv = (TextView) findViewById(R.id.tv);
		btn = (Button) findViewById(R.id.button1);
		add();
		btn.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				createXML();
			}
		});
	}
	/**
	 * 模拟手机抄表数据(添加十块表的数据)
	 * 每块表添加三个属性（户主：user_name,用户编号:user_number,地址：address）
	 */
	public void add(){
		for(int i=0;i<10;i++){
				HashMap<String, String> map = new HashMap<String, String>();
				map.put("user_name", "小白杨"+i);
				map.put("user_number", "010-888-"+i);
				map.put("address", "北京-海淀区-铸成大厦-"+i);
				list.add(map);
		}
	}

	public void createXML() {
		File linceseFile = new File(Task_PATH);
		try {
			linceseFile.createNewFile();
		} catch (IOException e) {
			Log.e("IOException", "exception in createNewFile() method");
		}
		FileOutputStream fileos = null;
		try {
			fileos = new FileOutputStream(linceseFile);
		} catch (FileNotFoundException e) {
			Log.e("FileNotFoundException", "can't create FileOutputStream");
		}

		XmlSerializer serializer = Xml.newSerializer();
		try {
			serializer.setOutput(fileos, "UTF-8");
			serializer.startDocument(null, true);
			
			serializer.startTag(null, "boxs");
			for (int i = 0; i < list.size(); i++) {
				serializer.startTag(null, "users");
				
				serializer.startTag(null, "user_name");
				serializer.text(list.get(i).get("user_name"));
				serializer.endTag(null, "user_name");
				serializer.startTag(null, "user_number");
				serializer.text(list.get(i).get("user_number"));
				serializer.endTag(null, "user_number");
				serializer.startTag(null, "address");
				serializer.text(list.get(i).get("address"));
				serializer.endTag(null, "address");
				
				serializer.endTag(null, "users");
			}
			serializer.endTag(null, "boxs");
			
			serializer.endDocument();
			serializer.flush();
			fileos.close();
		} catch (Exception e) {
			Log.e("Exception", "error occurred while creating xml file");
		}
		Toast.makeText(getApplicationContext(), "创建xml文件成功!",
				Toast.LENGTH_SHORT).show();

	}

}

AndroidManifest.xml：
记得添加sdcard权限！！

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.amaker.xml"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="10" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".CreateXmlActivity"
                  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>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
</manifest>