sebi

    private static final int CONNECTION_TIMEOUT = 10000;
    private static final int DATARETRIEVAL_TIMEOUT = 10000;
    private static final String SERVER_URL = "http://www.techtalents.info/login_app.php";
    private static String sessionID;

    private static String requestUrl(String url, String postParameters) {

        HttpURLConnection urlConnection = null;
        try {
            URL urlToRequest = new URL(url);
            urlConnection = (HttpURLConnection) urlToRequest.openConnection();
            urlConnection.setConnectTimeout(CONNECTION_TIMEOUT);
            urlConnection.setReadTimeout(DATARETRIEVAL_TIMEOUT);

            if (postParameters != null) {


                urlConnection.setDoOutput(true);
                urlConnection.setRequestMethod("POST");
                urlConnection.setFixedLengthStreamingMode(
                        postParameters.getBytes().length);
                urlConnection.setRequestProperty("Content-Type",
                        "application/x-www-form-urlencoded;charset=UTF-8");

                PrintWriter out = new PrintWriter(urlConnection.getOutputStream());
                out.print(postParameters);
                out.close();
            }

            int statusCode = urlConnection.getResponseCode();
            if (statusCode != HttpURLConnection.HTTP_OK) {

            }



            InputStream in =
                    new BufferedInputStream(urlConnection.getInputStream());
            String respuesta = getResponseText(in);
            return respuesta;




        } catch (MalformedURLException e) {

        } catch (SocketTimeoutException e) {

        } catch (IOException e) {

        } finally {
            if (urlConnection != null) {
                urlConnection.disconnect();
            }
        }

        return null;
    }

    private static String getResponseText(InputStream in) {
        try {
            Reader reader = new InputStreamReader(in, "UTF-8");
            char[]tamanio=new char[6];
            reader.read(tamanio);
            int tam = Integer.parseInt(new String(tamanio));

            char[] buffer = new char[tam];
            reader.read(buffer);
            return new String(buffer);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "";
    }

    public static boolean login(String username, String password) {
        String response = requestUrl(SERVER_URL, "username="+username+"&password="+password);

        if(response != null && response.startsWith("OK")){
            sessionID = response.substring(2);
            return true;
        }
        sessionID=null;
        return false;
    }

    public static String post(ArrayList<String> parametros){
        StringBuilder sb = new StringBuilder();
        if(sessionID == null){
            return null;
        }
        sb.append("sess_id=" + sessionID);
        for(int i=0;i<parametros.size();i++){
            sb.append("&" + parametros.get(i));
        }
        String response = requestUrl(SERVER_URL, sb.toString());
        Log.i("SERVER:",response);
        return response;
    }