When encountering the error message “dart library ‘dart:ui’ is not available on this platform.” in Dart, it means that the specific library or package you are trying to use is not supported on the platform you are running the code on. The ‘dart:ui’ library is specific to Flutter and cannot be used outside of Flutter.
The ‘dart:ui’ library provides low-level access to graphics and other platform-specific functionality in Flutter. It is responsible for rendering the user interface on the screen. However, this library is only available for Flutter applications and cannot be used in other Dart projects or non-Flutter platforms.
To resolve this issue, you have a few possible options depending on your specific requirements:
- If you are working on a Flutter project, make sure you have properly set up your Flutter environment and are running the code in a Flutter app. Flutter provides its own set of libraries and packages, including ‘dart:ui’, which are not available in regular Dart projects.
- If you are not working on a Flutter project and do not require the functionality provided by the ‘dart:ui’ library, you can simply remove or comment out the import statement for ‘dart:ui’ and any code that depends on it. The error should then disappear.
- If you need similar functionality to what ‘dart:ui’ provides in a non-Flutter project, you may need to find alternative libraries or packages that are compatible with your platform. There are various UI and graphics libraries available for different platforms in the Dart ecosystem that you can explore, such as ‘package:flutter/widgets’ for building UI in Flutter or ‘package:html’ for web-based UI.
Example:
Let’s assume you are trying to use ‘dart:ui’ in a regular Dart project that is not Flutter. In this case, you can remove the import statement for ‘dart:ui’ and any code that depends on it. Here’s an example:
// import 'dart:ui'; // Remove or comment out this line
void main() {
print("Hello, Dart!");
// Code that depends on 'dart:ui'
}