通过 Android 连接 Soap Service 时出错

Question

我想尝试（并且几乎崩溃）的是通过android连接到soap服务。这是我的代码：

SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
request.addPropterty("###", "###");
request.addProperty("user", "####");
request.addProperty("pwd", "####");

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

HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.setXmlVersionTag("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
androidHttpTransport.debug = true;

androidHttpTransport.call(SOAP_ACTION, envelope);

SoapObject response = (SoapObject) envelope.getResponse();

String resultData = response.getProperty("ort").toString();

我的私人信息是：

private static String SOAP_ACTION = "http://tempuri.org/Finder/Finder/###";
private static String NAMESPACE = "http://tempuri.org/Finder/Finder/";
private static String METHOD_NAME = "get##XY";
private static String URL = "http://###.at/###/Finder/Finder.asmx";

在我想要获得响应的行中，我收到以下错误：

SoapFault - faultcode: 'soap:Server' faultstring: 'Server was unable to process request. ---> Value cannot be null.

我几乎尝试了所有内容并在论坛等中阅读了很多内容，但无法找到任何对我有帮助的内容。我尝试将 dotNet 变量设置为 true/false、androidHttpTransport.debug true/false、setXmlVersionTag yes/no...

任何人都可以帮助我吗？