Скачать или смотреть How to Fix url_launcher Ignoring Number Signs in Flutter Dialer Calls

Discover how to solve the issue of Flutter's `url_launcher` ignoring number signs (# ) when dialing numbers, ensuring your app correctly dials codes like *123# .
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Resolving the url_launcher Number Sign Ignoring Issue in Flutter

If you are developing a Flutter application and using the url_launcher package to implement phone dialing features, you may encounter a frustrating issue: when dialing numbers that include a number sign (# ), the app may ignore it entirely. For instance, when attempting to dial *123# , the app only dials *123, leaving out the crucial number sign. This can happen when you are coding telecom services that require USSD codes or similar formats.

The Problem

The main issue here is that the url_launcher does not correctly handle special characters, such as the number sign. This can lead to incomplete or incorrect dialing, which can affect the functionality of your application, especially in telecom services where accurate dialing is paramount.

The Solution

Fortunately, there's a simple solution to this problem. By using Uri.encodeComponent, you can properly encode the number sign along with other special characters before passing it to the url_launcher. Here's how to implement this fix in your Flutter application.

Steps to Fix the Issue

Import the necessary package: Ensure you have the url_launcher package included in your pubspec.yaml file. If you haven't already, you can add it as follows:

[[See Video to Reveal this Text or Code Snippet]]

Use Uri.encodeComponent: When preparing the phone number string that includes special characters like # , make sure to encode it. Here's a sample implementation of how to do this:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

Uri.encodeComponent('*123# '): This function encodes the special characters in the string. In this case, it converts # into a format that can be safely transmitted in a URL context.

launch('tel:$number'): This function uses the encoded number to initiate the dialing process, ensuring that the application dials the correct number with the number sign included.

Conclusion

By following these straightforward steps and using Uri.encodeComponent, you can effectively solve the problem of url_launcher ignoring the number sign in your Flutter application. This will not only enhance the functionality of your app but also improve the user experience by ensuring that phone numbers are dialed correctly.

Feel free to try out this solution in your Flutter project, and simplify the dialing for your users today!