黑马Android:XML序列化器

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分类专栏：黑马Android 文章标签： android

本文链接：https://blog.youkuaiyun.com/cckevincyh/article/details/52260078

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package indi.cc.xmlserializer;

import indi.cc.xmlserializer.domain.Message;

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 android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Xml;
import android.view.View;


public class MainActivity extends ActionBarActivity {
    List<Message> smsList;

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

     // 虚拟10条短信
        smsList = new ArrayList<Message>();
        for (int i = 0; i < 10; i++) {
            Message sms = new Message("wrennaaaa!!!" + i, System.currentTimeMillis()
                    + "", "138" + i + i, "1");
            smsList.add(sms);
        }

    }

    public void click(View v){
        //使用xml序列化器生成xml文件
        //1.拿到序列化器对象
        XmlSerializer xs = Xml.newSerializer();
        //2.初始化
        File file = new File("sdcard/sms2.xml");
        try {
            FileOutputStream fos = new FileOutputStream(file);
            //enconding:指定用什么编码生成xml文件
            xs.setOutput(fos, "utf-8");

            //3.开始生成xml文件
            //enconding:指定头结点中的enconding属性的值
            xs.startDocument("utf-8", true);

            xs.startTag(null, "message");

            for(Message sms : smsList){
xs.startTag(null, "sms");

                xs.startTag(null, "body");
                xs.text(sms.getBody() + "<body>");
                xs.endTag(null, "body");

                xs.startTag(null, "date");
                xs.text(sms.getDate());
                xs.endTag(null, "date");

                xs.startTag(null, "type");
                xs.text(sms.getType());
                xs.endTag(null, "type");

                xs.startTag(null, "address");
                xs.text(sms.getAddress());
                xs.endTag(null, "address");

                xs.endTag(null, "sms");

            }
            xs.endTag(null, "message");

            //告诉序列化器，文件生成完毕
            xs.endDocument();

        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

package indi.cc.xmlserializer.domain;

public class Message {
    private String body;
    private String date;
    private String address;
    private String type;
    public String getBody() {
        return body;
    }
    public void setBody(String body) {
        this.body = body;
    }
    public String getDate() {
        return date;
    }
    public void setDate(String date) {
        this.date = date;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public Message(String body, String date, String address, String type) {
        super();
        this.body = body;
        this.date = date;
        this.address = address;
        this.type = type;
    }
}

<!--添加权限-->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<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="indi.cc.xmlserializer.MainActivity" >

   <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="备分短信" 
        android:onClick="click"
        />

</RelativeLayout>