private class SendLoginData extends AsyncTask<String, Void, String> {

        private ProgressDialog pDialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(LoginActivity.this);
            pDialog.setMessage("Please wait...");
            pDialog.setCancelable(false);
            pDialog.show();
        }

        @SuppressWarnings("deprecation")
        @Override
        protected String doInBackground(String... arg) {
            String username = arg[0];
            String password = arg[1];

            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("username", username));
            params.add(new BasicNameValuePair("password", password));
            ServiceHandler serviceClient = new ServiceHandler();
            String json = serviceClient.makeServiceCall(API_LOGIN, ServiceHandler.POST, params);
            Log.d("Cek-json","json: " + json);

            String permission = null;
            String status = null;
            if (json != null) {
                try {
                    JSONObject jsonObj = new JSONObject(json);
                    permission = jsonObj.getString("GroupPermission");
                    status = jsonObj.getString("status");
                } catch (JSONException e) {
                    e.printStackTrace();
                }

            } else {
                Log.e("JSON Data", "Didn't receive any data from server!");
            }

            Log.d("Cek-json","result: " + permission);
            return status;
        }

        @Override
        protected void onPostExecute(String result) {
            if (pDialog.isShowing())
                pDialog.dismiss();

            if (result.equals("sukses")) {
                Intent intent = new Intent(LoginActivity.this, MenuActivity.class);
                intent.putExtra("USERNAME", mUsername);
                startActivity(intent);
            } else {
                Toast.makeText(getApplication(), "Username/Password tidak valid", Toast.LENGTH_LONG).show();
            }

        }
    }