public void goToSincronizar2(View view) {
        DatabaseHelper myDb;
        // al crear el objeto myDb ejecutamos las sentencias, para crear las tablas necesarias
        myDb = new DatabaseHelper(this);
        myDb.init();
        Cursor res = myDb.extraeconfig();
        String xUrl = "";
        String xUser = "";
        String xPass = "";
        String xCatalogo = "";
        if (res != null && res.getCount() > 0) {
            res.moveToFirst();
            xUrl = res.getString(res.getColumnIndex("dburl")) + res.getString(res.getColumnIndex("dbdatabase"));
            xUser = res.getString(res.getColumnIndex("dbuser"));
            xPass = res.getString(res.getColumnIndex("dbpass"));
            xCatalogo = "cFrigorificos";
        } else {
            Toast.makeText(this, "ERROR archivo de configuracion (swItsol.db)", Toast.LENGTH_LONG).show();
        }
        HashMap<String, String> params = new HashMap<>();
        params.put("xCatalogo", xCatalogo);
        params.put("xUrl", xUrl);
        params.put("xUser", xUser);
        params.put("xPass", xPass);

        final String XxCatalogo = xCatalogo;
        final String XxUrl = xUrl;
        final String XxUser = xUser;
        final String XxPass = xPass;
        JsonObjectRequest js = new JsonObjectRequest(
                Request.Method.POST,
                "http://192.168.0.10:8080/jinvmanz/wwwcatalogosMobiles/extraecatalogos.jsp",
                null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        Log.d("tag", "User creation completed successfully");
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Log.i("tag", "error 404 " + error.getMessage());

                    }
                }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                HashMap<String, String> params = new HashMap<>();
                params.put("xCatalogo", XxCatalogo);
                params.put("xUrl", XxUrl);
                params.put("xUser", XxUser);
                params.put("xPass", XxPass);
                return params;
            }
        };
        RequestQueue queue = Volley.newRequestQueue(actMenu.this);
        queue.add(js);
    }