KSOAP2 AndroidHttpTransport.call connection = null

Question

当我尝试运行我的androidHttpTransport.call(SOAP_ACTION, envelope);我的程序错误时，然后在逐步执行它时，我可以看到connection=null它应该是这样的吗？ （我假设不是）如果不是，那么有人可以告诉我是什么原因造成的吗？

private static final String NAMESPACE   =   "http://tempuri.org/";
private static final String URL         =   "http://foo/bar/Service1.asmx";
private static final String METHOD_NAME =  "HelloWorld";
private static final String SOAP_ACTION =  "http://tempuri.org/HelloWorld";

public void getMessage() {

    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
            SoapEnvelope.VER11);
    Log.i(TAG, "Envelope to String: \n" + String.valueOf(envelope));

    Log.i(TAG, "request to String: \n" + String.valueOf(request));

    envelope.dotNet = true;

    //Set output SOAP object
    envelope.setOutputSoapObject(request);
    //Create HTTP call object
    HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

    try {
        //Invoke web service
        androidHttpTransport.debug=true;
        androidHttpTransport.setXmlVersionTag("<!--?xml version=\"1.0\" encoding= \"UTF-8\" ?-->");
        blah = androidHttpTransport.requestDump;

        androidHttpTransport.call(SOAP_ACTION, envelope);

        //Get the response
        SoapPrimitive response = (SoapPrimitive) envelope.getResponse();
        //Assign it to fahren static variable
        message = response.toString();

    } catch (Exception e) {
        e.printStackTrace();
        /*Log.i("HT", blah);
        Log.i("Exception", e.getMessage().toString());*/
    }
}

}

这是调用正在进行的调试：

这是错误输出后的视图：

有人知道这可能是什么原因吗？