Android使用Pull生成XML

需要生成的XML文件格式如下:

<SendMsg name="user_logonAz">
    <Phone ID="123456" />
    <UserName>张三</UserName>
    <Vertion>
        <phonenum numID="001">第一部手机</phonenum>
    </Vertion>
</SendMsg>

下面的一个方法用来生成这个XML并以字符串格式返回:

public String getString() {
        XmlSerializer serializer = Xml.newSerializer();
        StringWriter stringWriter = new StringWriter();
        try {
            serializer.setOutput(stringWriter);
            serializer.startDocument("utf-8", true);//CHARSET_UTF8
            
            String nameSpace = null;
            
            serializer.startTag(nameSpace, "SendMsg");
            serializer.attribute(nameSpace, "name","user_logonAz");
            // 手机设备号
            serializer.startTag(nameSpace, "Phone");
            // 添加属性
            serializer.attribute(nameSpace, "ID", "123456");
            serializer.endTag(nameSpace, "Phone");
            // 用户名
            serializer.startTag(nameSpace, "UserName");
            serializer.text("张三");
            serializer.endTag(nameSpace, "UserName");
            // 版本号
            serializer.startTag(nameSpace, "Vertion");
            serializer.startTag(nameSpace, "phonenum");
            serializer.attribute(nameSpace, "numID", "001");
            serializer.text("第一部手机");
            serializer.endTag(nameSpace, "phonenum");
            serializer.endTag(nameSpace, "Vertion");
            
            serializer.endTag(nameSpace, "SendMsg");
            serializer.endDocument();
            
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return stringWriter.toString();
    }