生成
<??>
<message>
<sms> <body>第0条短信</body> <date>1465041254178</date> <address>000</address> <type>1</type> </sms>
<sms> <body>第1条短信</body> <date>1465041254179</date> <address>111</address> <type>1</type> </sms>
<sms> <body>第2条短信</body> <date>1465041254179</date> <address>222</address> <type>1</type> </sms></message>
建立Sms类
package com.wuyudong.createpublic 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; }}整几个虚拟的短信对象，存在list中,备份数据通常都是备份至sd卡
使用StringBuffer拼接字符串,* 把整个
sb.append("<? //添加smss的开始节点
sb.append("<smss>");
.......
* 把sb写到输出流中
fos.write(sb.toString().getBytes());
完整代码如下：
package com.wuyudong.createimport java.io.File;import java.io.FileOutputStream;import java.util.ArrayList;import java.util.List;import com.wuyudong.createimport 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); // 创建10条虚拟短信 message = new ArrayList<Sms>(); for (int i = 0; i < 10; i++) { Sms sms = new Sms("第" + i + "条短信", System.currentTimeMillis() + "", "1", "" + i + i + i); message.add(sms); } } public void click(View v) { File file = new File(Environment.getExternalStorageDirectory(), "backup.); try { FileOutputStream fos = new FileOutputStream(file); StringBuffer sb = new StringBuffer(); // 添加 sb.append("<?); // 添加根节点 sb.append("<message>"); // 每一条短信添加一个sms节点 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(); } }}原标题：Android 生成xml文件
关键词：Android
我知道了 