Dart / Flutter - Validating a string for URL

You can use the [url_launcher][1] package for this.

Future<bool> checkIfUrlIsValid({required String url}) async {
if (await canLaunchUrl(Uri.parse(url))) {
return true;
}
return false;}


checkIfUrlIsValid(url: 'https://google.com'); // true;
checkIfUrlIsValid(url: 'google com'); // false;


[1]:

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Use this simple function then you can identify string is valid URL or not


bool isURl(String url){
return RegExp(r'^((?:.|\n)*?)((http:\/\/www\.|https:\/\/www\.|http:\/\/|https:\/\/)?[a-z0-9]+([\-\.]{1}[a-z0-9]+)([-A-Z0-9.]+)(/[-A-Z0-9+&@#/%=~_|!:,.;]*)?(\?[A-Z0-9+&@#/%=~_|!:‌​,.;]*)?)')
.hasMatch(url); }

If you are using [GetX][1], it provides a string extension called "isURL":

```dart
import 'package:get/get.dart';

final url = 'https://www.google.com/';

if (url.isURL) {
print('Success');
}
```

Note: you should not install this plugin if you will only use this extension, the idea is to take advantage of it if you already use it.

More String extensions from GetX:

- isNum
- isNumericOnly
- isAlphabetOnly
- isBool
- isDocumentFileName
- isExcelFileName
- isEmail
- isPhoneNumber
- isDateTime

And others.

See: [

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][2]


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