本地发布的WEBSERVICE 安卓怎么访问service的方法？

本地发布的是http://localhost:21368/WebService.asmx
安卓怎么访问？String NAME_SPACE="http://10.0.2.2:21368/";//命名空间  ,后期测试一下命名空间的作用   
      String METHOD_NAME = "About";   
      String URL = "http://10.0.2.2:21368/WebService.asmx?op";// 投递SOAP数据的目标地址   
      SoapObject sobject=new SoapObject(NAME_SPACE, METHOD_NAME);      
          SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(SoapEnvelope.VER11);//告诉SoapSerializationEnvelope把构造好的SoapObject封装进去：   
         envelope.dotNet=true;
          envelope.bodyOut=sobject;
          envelope.setOutputSoapObject(sobject) ; 
          AndroidHttpTransport ht=new AndroidHttpTransport(URL);   
         try {
          ht.debug=true;
ht.call(NAME_SPACE, envelope);
SoapObject so=(SoapObject) envelope.getResponse();
//String getReturn= so.getProperty("return").toString();

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}