如何在颤振文本字段中为用户输入的字符串添加 http/https？

Question

I'm using texteditingcontrollers and if a user enters stackoverflow.com I want it to be taken as https://stackoverflow.com , so I can open the link using url_launcher package. Can this be done in dart?

Answer 1

Something like this could be done using Dart language:

@override
Future<void> launchUrl({required String url}) async {
  url = checkUrl(url);

  try {
    final bool shouldContinue = await canLaunch(url);

    if (shouldContinue) {
      await launch(url, forceSafariVC: false);
      return;
    }

    throw Exception('Could not launch $url');
  } catch (e) {}
}

String checkUrl(String url) {
  if (url.startsWith('http')) return url;

  return 'https://$url';
}

You may also take a look at string_validator . Instead of creating your validating method , you may use a package like this one.

If you have further questions, please don't hesitate to write in the comments.