使XML序列化器生成XML文件

核心代码

package com.example.createxml;import android.app.Activity;import android.os.Environment;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.util.Xml;import android.view.Menu;import android.view.MenuItem;import android.view.View;import org.xmlpull.v1.XmlSerializer;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.List;public class Xmlserializer extends Activity {    private List<Message> list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_xmlserializer);    }    public void click(View v){        list = new ArrayList<>();        for (int i = 0; i < 10; i++) {            Message msg = new Message("苗戴" + i, System.currentTimeMillis() + "", 1 + "", "我是body" + i);            list.add(msg);        }        //1.得到序列化对象        XmlSerializer xs = Xml.newSerializer();        //存放到SD卡中注意添加可读权限  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>        //sdcard/message.xml        File file = new File(Environment.getExternalStorageDirectory(), "message.xml");        try {            FileOutputStream fos = new FileOutputStream(file);            //2.对序列化对象进行初始化            xs.setOutput(fos, "utf-8");            //3.生成文件，生成头结点            xs.startDocument("utf-8", true);            xs.startTag(null, "messages");            for(Message msg : list){                xs.startTag(null,"message");                xs.startTag(null,"address");                xs.text(msg.getAddress());                xs.endTag(null, "address");                xs.startTag(null,"date");                xs.text(msg.getDate());                xs.endTag(null, "date");                xs.startTag(null,"type");                xs.text(msg.getType());                xs.endTag(null,"type");                xs.startTag(null,"body");                xs.text(msg.getBody());                xs.endTag(null,"body");                xs.endTag(null,"message");            }            xs.endTag(null,"messages");            xs.endDocument();        } catch (Exception e) {            e.printStackTrace();        }    }}

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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="com.example.createxml.Xmlserializer">    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/createxml"        android:onClick="click"/></RelativeLayout>

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Message类

package com.example.createxml;/** * Created by joy on 2015/12/20. */public class Message {    public Message(String address, String date, String type, String body) {        this.address = address;        this.date = date;        this.type = type;        this.body = body;    }    private String address;    private String date;    private String type;    private String body;    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }    public String getDate() {        return date;    }    public void setDate(String date) {        this.date = date;    }    public String getType() {        return type;    }    public void setType(String type) {        this.type = type;    }    public String getBody() {        return body;    }    public void setBody(String body) {        this.body = body;    }    @Override    public String toString() {        return "Message{" +                "address='" + address + '\'' +                ", date='" + date + '\'' +                ", type='" + type + '\'' +                ", body='" + body + '\'' +                '}';    }}

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生成的XML文件

<messages><message><address>苗戴0</address><date>1451094799432</date><type>1</type><body>我是body0</body></message><message><address>苗戴1</address><date>1451094799433</date><type>1</type><body>我是body1</body></message><message><address>苗戴2</address><date>1451094799433</date><type>1</type><body>我是body2</body></message><message><address>苗戴3</address><date>1451094799433</date><type>1</type><body>我是body3</body></message><message><address>苗戴4</address><date>1451094799433</date><type>1</type><body>我是body4</body></message><message><address>苗戴5</address><date>1451094799433</date><type>1</type><body>我是body5</body></message><message><address>苗戴6</address><date>1451094799433</date><type>1</type><body>我是body6</body></message><message><address>苗戴7</address><date>1451094799433</date><type>1</type><body>我是body7</body></message><message><address>苗戴8</address><date>1451094799434</date><type>1</type><body>我是body8</body></message><message><address>苗戴9</address><date>1451094799434</date><type>1</type><body>我是body9</body></message></messages>