KSOAP2-Android addPropery不起作用

public class HelloSOAPAndroidClientActivity extends Activity {

//you can get these values from the wsdl file
private static final String SOAP_ACTION = \"\";
private static final String OPERATION_NAME = \"sayHello\";
private static final String WSDL_TARGET_NAMESPACE = \"http://example.com/\";
private static final String SOAP_ADDRESS = \"http://testitthanks.appspot.com/hellosoapserver\";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    TextView textView = new TextView(this);
    setContentView(textView);

    SoapObject request = new SoapObject(WSDL_TARGET_NAMESPACE,
            OPERATION_NAME);
    request.addProperty(\"arg0\",\"ONE\");

    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
            SoapEnvelope.VER11);
    envelope.dotNet = true;
    envelope.setOutputSoapObject(request);

    HttpTransportSE httpTransport = new HttpTransportSE(SOAP_ADDRESS);
    httpTransport.debug = true;

    try {

        httpTransport.call(SOAP_ACTION, envelope);
        Log.v(\"TEST\", httpTransport.requestDump);
        Log.v(\"TEST\", httpTransport.responseDump);

        Object response = envelope.getResponse();       
        textView.setText(response.toString());


    } catch (Exception exception) {
        textView.setText(exception.toString());
    }
}
}

<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>
<!-- Generated by JAX-WS RI at http://jax-ws.dev.java.net. RI\'s version is JAX-WS RI 2.1.6 in JDK 6. -->
<definitions targetNamespace=\"http://example.com/\" name=\"GreeterService\" xmlns=\"http://schemas.xmlsoap.org/wsdl/\" xmlns:tns=\"http://example.com/\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/wsdl/soap/\">
  <types>
    <xsd:schema>
      <xsd:import namespace=\"http://example.com/\" schemaLocation=\"GreeterService_schema1.xsd\"/>
    </xsd:schema>
  </types>
  <message name=\"sayHello\">
    <part name=\"parameters\" element=\"tns:sayHello\"/>
  </message>
  <message name=\"sayHelloResponse\">
    <part name=\"parameters\" element=\"tns:sayHelloResponse\"/>
  </message>
  <message name=\"sayGoodbye\">
    <part name=\"parameters\" element=\"tns:sayGoodbye\"/>
  </message>
  <message name=\"sayGoodbyeResponse\">
    <part name=\"parameters\" element=\"tns:sayGoodbyeResponse\"/>
  </message>
  <portType name=\"Greeter\">
    <operation name=\"sayHello\">
      <input message=\"tns:sayHello\"/>
      <output message=\"tns:sayHelloResponse\"/>
    </operation>
    <operation name=\"sayGoodbye\">
      <input message=\"tns:sayGoodbye\"/>
      <output message=\"tns:sayGoodbyeResponse\"/>
    </operation>
  </portType>
  <binding name=\"GreeterPortBinding\" type=\"tns:Greeter\">
    <soap:binding transport=\"http://schemas.xmlsoap.org/soap/http\" style=\"document\"/>
    <operation name=\"sayHello\">
      <soap:operation soapAction=\"\"/>
      <input>
        <soap:body use=\"literal\"/>
      </input>
      <output>
        <soap:body use=\"literal\"/>
      </output>
    </operation>
    <operation name=\"sayGoodbye\">
      <soap:operation soapAction=\"\"/>
      <input>
        <soap:body use=\"literal\"/>
      </input>
      <output>
        <soap:body use=\"literal\"/>
      </output>
    </operation>
  </binding>
  <service name=\"GreeterService\">
    <port name=\"GreeterPort\" binding=\"tns:GreeterPortBinding\">
      <soap:address location=\"http://testitthanks.appspot.com/hellosoapserver\"/>
    </port>
  </service>
</definitions>

<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>
    <sayHello xmlns=\"http://example.com/\" id=\"o0\" c:root=\"1\">
    <arg0 i:type=\"d:string\">ONE</arg0>
    </sayHello>
    </v:Body>
</v:Envelope>

<SOAP-ENV:Envelope 
    xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\">
    <SOAP-ENV:Header/>
    <SOAP-ENV:Body>
    <ns3:sayHelloResponse xmlns:ns3=\"http://example.com/\">
    <return>Hello, null!</return>
    </ns3:sayHelloResponse>
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>
<xs:schema version=\"1.0\" targetNamespace=\"http://example.com/\" xmlns:tns=\"http://example.com/\" xmlns:xs=\"http://www.w3.org/2001/XMLSchema\">

  <xs:element name=\"sayGoodbye\" type=\"tns:sayGoodbye\"/>

  <xs:element name=\"sayGoodbyeResponse\" type=\"tns:sayGoodbyeResponse\"/>

  <xs:element name=\"sayHello\" type=\"tns:sayHello\"/>

  <xs:element name=\"sayHelloResponse\" type=\"tns:sayHelloResponse\"/>

  <xs:complexType name=\"sayHello\">
    <xs:sequence>
      <xs:element name=\"arg0\" type=\"xs:string\" minOccurs=\"0\"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name=\"sayHelloResponse\">
    <xs:sequence>
      <xs:element name=\"return\" type=\"xs:string\" minOccurs=\"0\"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name=\"sayGoodbye\">
    <xs:sequence>
      <xs:element name=\"arg0\" type=\"xs:string\" minOccurs=\"0\"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name=\"sayGoodbyeResponse\">
    <xs:sequence>
      <xs:element name=\"return\" type=\"xs:string\" minOccurs=\"0\"/>
    </xs:sequence>
  </xs:complexType>
</xs:schema>