安卓应用开发实战：[19]写xml文件

2025-11-19 22:55:32

1、下面这个类可以用来存放短信信息，短信发送接收时间data, 短信类型type,短信内容body, 电话号码address。smsinfo自定义类代码

package com.example.smsinfo;

public class SmsInfo {

private long data;

private int type;

private String body;

private String Address;

public SmsInfo() {

}

public SmsInfo(long data, int type, String body, String address) {

super();

this.data = data;

this.type = type;

this.body = body;

Address = address;

}

public long getData() {

return data;

}

public void setData(long data) {

this.data = data;

}

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) {

Address = address;

}

安卓应用开发实战：[19]写xml文件

2、在onCreate()方法内模拟产生了10条短信，其中 Random类可以获得随机数

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();

for(int i = 0;i<10;i++) {

smsInfos.add(new SmsInfo(System.currentTimeMillis(), random.nextInt(2)+1, "短信内容", i+100+""));

}

安卓应用开发实战：[19]写xml文件

3、下面这段程序可以为创建xml文件开辟缓冲器，也就是把短信内容写得运存中。

StringBuilder sb = new StringBuilder();

sb.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");

sb.append("<smss>");

for(SmsInfo oneIfo: smsInfos) {

sb.append("<data>");

sb.append(oneIfo.getData());

sb.append("</data>");

sb.append("<type>");

sb.append(oneIfo.getType());

sb.append("</type>");

sb.append("<body>");

sb.append(oneIfo.getBody());

sb.append("</body>");

sb.append("<address>");

sb.append(oneIfo.getAddress());

sb.append("</address>");

}

sb.append("</smss>");

安卓应用开发实战：[19]写xml文件

4、下面这段程序是往磁盘文件里写操作了，涉及到到IO操作处理异常。File file = new File(Environment.getExternalStorageDirectory()+"/backSmsInfo.xml"); FileOutputStream fos; try { fos = new FileOutputStream(file); try { fos.write(sb.toString().getBytes()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } try { fos.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); }

安卓应用开发实战：[19]写xml文件

5、如果使用使用安卓提供的序列化类XmlSerializer ，上面的操作就变得简单：下面这段代码就是写一个简单的xml文件

XmlSerializer serializer = Xml.newSerializer();

File file = new File(Environment.getExternalStorageDirectory()

+ "/backSmsInfo2.xml");

FileOutputStream fos;

try {

fos = new FileOutputStream(file);

serializer.setOutput(fos, "utf-8");

serializer.startDocument("utf-8", true);

serializer.startTag(null, "smss");

for(SmsInfo ifo : smsInfos) {

serializer.startTag(null, "sms");

serializer.attribute(null, "id" ,ifo.getId()+"");

serializer.startTag(null, "data");

serializer.text(ifo.getBody()+"");

serializer.endTag(null, "data");

serializer.endTag(null, "sms");

}

serializer.endTag(null, "smss");

serializer.endDocument();

} 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();

};

安卓应用开发实战：[19]写xml文件

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