Java 无法使用KSOAP生成正确的请求

我正在使用ksoap在android中使用soap Web服务

以下是我能够生成的请求：

<?xml version="1.0" encoding="utf-8"?>
<v:Envelope xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:d="http://www.w3.org/2001/XMLSchema" xmlns:c="http://schemas.xmlsoap.org/soap/encoding/" xmlns:v="http://schemas.xmlsoap.org/soap/envelope/">
 <v:Header />
 <v:Body>
  <registerUser xmlns="http://ws.itec.com/">
   <email>droidwala@gmail.com</email>
  </registerUser>
 </v:Body>
</v:Envelope>

请帮助我生成两种可接受格式中的任意一种。 谢谢

<?xml version="1.0" encoding="utf-8"?>
<v:Envelope xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:d="http://www.w3.org/2001/XMLSchema" xmlns:c="http://schemas.xmlsoap.org/soap/encoding/" xmlns:v="http://schemas.xmlsoap.org/soap/envelope/">
 <v:Header />
 <v:Body>
  <registerUser xmlns="http://ws.itec.com/">
   <email xmlns="">droidwala@gmail.com</email>
  </registerUser>
 </v:Body>
</v:Envelope>

   <?xml version="1.0" encoding="utf-8"?>
    <v:Envelope xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:d="http://www.w3.org/2001/XMLSchema" xmlns:c="http://schemas.xmlsoap.org/soap/encoding/" xmlns:v="http://schemas.xmlsoap.org/soap/envelope/">
     <v:Header />
     <v:Body>
      <n0:registerUser xmlns:n0="http://ws.itec.com/">
       <email>droidwala@gmail.com</email>
      </registerUser>
     </v:Body>
    </v:Envelope>