標籤：
產生XML檔案備份簡訊，其格式為:
<?xml version="1.0" encoding="UTF-8" standalone="true"?>
<message>
<sms> <body>第0條簡訊</body> <date>1465041254178</date> <address>000</address> <type>1</type> </sms>
<sms> <body>第1條簡訊</body> <date>1465041254179</date> <address>111</address> <type>1</type> </sms>
<sms> <body>第2條簡訊</body> <date>1465041254179</date> <address>222</address> <type>1</type> </sms></message>
建立Sms類
package com.wuyudong.createxml.domain;public class Sms { private String body; private String date; private String type; private String address; public Sms(String body, String date, String type, String address) { super(); this.body = body; this.date = date; this.type = type; this.address = address; } 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 getType() { return type; } public void setType(String type) { this.type = type; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; }}
整幾個虛擬簡訊對象，存在list中,備份資料通常都是備份至sd卡
使用StringBuffer拼接字串,* 把整個xml檔案所有節點append到sb對象裡
sb.append("<?xml version=‘1.0‘ encoding=‘utf-8‘ standalone=‘yes‘ ?>");
//添加smss的開始節點
sb.append("<smss>");
.......
* 把sb寫到輸出資料流中
fos.write(sb.toString().getBytes());
完整代碼如下：
package com.wuyudong.createxml;import java.io.File;import java.io.FileOutputStream;import java.util.ArrayList;import java.util.List;import com.wuyudong.createxml.domain.Sms;import android.os.Bundle;import android.os.Environment;import android.app.Activity;import android.view.Menu;import android.view.View;public class MainActivity extends Activity { List<Sms> message; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 建立10條虛擬簡訊 message = new ArrayList<Sms>(); for (int i = 0; i < 10; i++) { Sms sms = new Sms("第" + i + "條簡訊", System.currentTimeMillis() + "", "1", "" + i + i + i); message.add(sms); } } public void click(View v) { File file = new File(Environment.getExternalStorageDirectory(), "backup.xml"); try { FileOutputStream fos = new FileOutputStream(file); StringBuffer sb = new StringBuffer(); // 添加xml頭 sb.append("<?xml version=‘1.0‘ encoding=‘utf-8‘ standalone=‘yes‘ ?>"); // 添加根節點 sb.append("<message>"); // 每一條簡訊添加一個sms節點 for (Sms sms : message) { sb.append("<sms>"); sb.append("<body>"); sb.append(sms.getBody()); sb.append("</body>"); sb.append("<date>"); sb.append(sms.getDate()); sb.append("</date>"); sb.append("<address>"); sb.append(sms.getAddress()); sb.append("</address>"); sb.append("<type>"); sb.append(sms.getType()); sb.append("</type>"); sb.append("</sms>"); } sb.append("</message>"); fos.write(sb.toString().getBytes()); fos.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } }}
Android 產生xml檔案
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