xml文件的序列化

发布时间：2020-12-16 00:33:59 所属栏目：百科来源：网络整理

导读：MainActivity.xml package com.demo.generatexml;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 java.util.Random;impo

MainActivity.xml

package com.demo.generatexml;

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 java.util.Random;

import org.xmlpull.v1.XmlSerializer;

import android.os.Bundle;
import android.os.Environment;
import android.provider.Telephony.Sms;
import android.app.Activity;
import android.util.Xml;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {
	private List<SmsInfo> smsInfos;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		smsInfos = new ArrayList<SmsInfo>();
		Random random = new Random();
		long number = 135986456;
		for(int i=0; i<10; i++){
			smsInfos.add(new SmsInfo(System.currentTimeMillis(),random.nextInt(2)+1,"短信内容"+i,Long.toString(number+i),i));
		}
	}
	
	public void backSms(View view){
		//假设我已经备份了所有的短信
		StringBuilder sb = new StringBuilder();
		sb.append("<?xml version="1.0" encoding="utf-8"?>");
		sb.append("<smss>");
		for(SmsInfo info : smsInfos){
			sb.append("<smss>");
			
			sb.append("<address>");
			sb.append(info.getAddress());
			sb.append("</address>");
			
			sb.append("<type>");
			sb.append(info.getType());
			sb.append("</type>");
			
			sb.append("<body>");
			sb.append(info.getBody());
			sb.append("</body>");
			
			sb.append("<date>");
			sb.append(info.getDate());
			sb.append("</date>");
			
			sb.append("</smss>");
		}
		sb.append("</smss>");

		try {
			File file = new File(Environment.getExternalStorageDirectory(),"backup.xml");
			FileOutputStream fos;
			fos = new FileOutputStream(file);
			fos.write(sb.toString().getBytes());
			fos.close();	
			Toast.makeText(this,"备份成功",0).show();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			Toast.makeText(this,"备份失败",0).show();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			Toast.makeText(this,0).show();
		}
			
	}
	public void backSms2(View view){
		try {
			XmlSerializer serializer = Xml.newSerializer();
			File file = new File(Environment.getExternalStorageDirectory(),"backup2.xml");
			FileOutputStream os = new FileOutputStream(file);
			serializer.setOutput(os,"utf-8");
			serializer.startDocument("utf-8",true);
			serializer.startTag(null,"smss");
			for(SmsInfo info : smsInfos){
				serializer.startTag(null,"sms");
				serializer.attribute(null,"id",info.getId()+"");
				
				serializer.startTag(null,"body");
				serializer.text(info.getBody());
				serializer.endTag(null,"body");
				
				serializer.startTag(null,"address");
				serializer.text(info.getAddress());
				serializer.endTag(null,"address");
				
				serializer.startTag(null,"type");
				serializer.text(info.getType() + "");
				serializer.endTag(null,"type");
				
				serializer.startTag(null,"date");
				serializer.text(info.getDate() + "");
				serializer.endTag(null,"date");
				
				
				
				serializer.endTag(null,"sms");
			}
			serializer.endTag(null,"smss");
			serializer.endDocument();
			
			os.close();
			Toast.makeText(this,0).show();
			
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			Toast.makeText(this,0).show();
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			// TODO Auto-generated catch block
			Toast.makeText(this,0).show();
			e.printStackTrace();
		} catch (IllegalStateException e) {
			// TODO Auto-generated catch block
			Toast.makeText(this,0).show();
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			Toast.makeText(this,0).show();
			e.printStackTrace();
		}
	}
}

SmsInfo.java

package com.demo.generatexml;

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

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}
	
	
	
}

activity_main.xml

<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=".MainActivity" >

    <Button
        android:id="@+id/btn_backSms"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="71dp"
        android:onClick="backSms"
        android:text="备份短信" />

    <Button
        android:id="@+id/btn_backSms2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/btn_backSms"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="84dp"
        android:text="备份短信2"
        android:onClick="backSms2" />

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.demo.generatexml"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="19" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.demo.generatexml.MainActivity"
            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>

</manifest>

（编辑：李大同）

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