Code:

            String response ;
            try {
                final String SOAP_ACTION = "http://tempuri.org/myAction";
                final String URL = "MYURL";
                HttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(URL);
                String bodyOut = "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:tem=\"http://tempuri.org/\">"
                        + "   <soapenv:Header/>"
                        + "   <soapenv:Body>"
                        ........ MY Data.......
                        + "      </tem:Login>"
                        + "   </soapenv:Body>" + "</soapenv:Envelope>";

                StringEntity se = new StringEntity(bodyOut, HTTP.UTF_8);
                    //StringEntity se = new StringEntity(request1, HTTP.UTF_8); 
                se.setContentType("text/xml");
                httpPost.addHeader("SOAPAction", SOAP_ACTION);
                httpPost.setEntity(se);

                HttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity resEntity = httpResponse.getEntity();
                response = EntityUtils.toString(resEntity);
                if (response != null) {
                    Log.i("Response", "" + response);// this is not being printed
                    Log.i("test response", "not null");// this is being printed
                }
                else
                    Log.i("Response", "null");
            } catch (Exception e) {
                e.printStackTrace();
            }

keine Ausnahme aber:Log.i("Response", "" + response);// this is not being printed

LogCat:

08-02 19:04:51.929: I/test response(20413): not null