Dimenticavo, questa dovrebbe essere (credo) la parte di codice incriminata

codice:
try{
                HttpClient httpclient = new DefaultHttpClient();
                HttpPost httppost = new HttpPost("10.0.2.2/xampp/demoapp/webservice.php?cap=09000");
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                HttpResponse response = httpclient.execute(httppost);
                HttpEntity entity = response.getEntity();
                is = entity.getContent();
        }