Uri uriResult;
            if (Uri.TryCreate(url, UriKind.Absolute, out uriResult) && (uriResult.Scheme == Uri.UriSchemeHttp || uriResult.Scheme == Uri.UriSchemeHttps) && webviews_manager.ProductWebviewIsValid)
            {
                print("Url is valid. Showing product webview");
                webview.Show();
            }
            else
            {
                MobileNativeMessage msg = new MobileNativeMessage("Errore 77", "Pagina richiesta non disponibile");
                throw new InvalidProductURLException(url);
            }