Cannot run with sound null safety because dependencies don’t support null safety Conclusion

If you’re experiencing issues trying to run your Flutter application due to unsound null safety, there are a few things you can do to resolve the problem. First and foremost, make sure you understand what unsound null safety is all about.

Understanding Unsounded Null Safety

Unsounded null safety in Flutter refers to the possibility of dealing with nullable types without explicit checks for those types. This feature allows developers to work with potentially null values without having to declare them explicitly, which can be convenient but also lead to issues down the line.

Turning Off Sound Null Safety

Now that you know a bit about unsound null safety, let’s talk about how you can turn it off in your application. If you want to disable sound null safety for your Flutter app, you can use the following command:

flutter run --no-sound-null-safety

This will tell Flutter not to enforce strict null safety rules when running your application. Keep in mind that this is a potentially risky approach and may lead to unexpected behavior or crashes if not used with caution.

History of the Command

It’s worth noting that the –no-sound-null-safety option was not originally documented, but I’ve found it to be safe to use over several months (especially since Flutter itself migrated to null safety). The documentation has since been updated with a guide on testing or running mixed-version programs.

Setting Up in Your IDE

To set up unsound null safety in your Integrated Development Environment (IDE) of choice, you’ll need to add a specific argument or configuration. Here’s how to do it:

In IntelliJ/Android Studio

You can follow these steps to enable unsound null safety in IntelliJ/Android Studio:

1. Edit your run configurations.
2. Add the –no-sound-null-safety argument under ‘Additional run args’.

In Visual Studio Code

Here’s how to set it up for Visual Studio Code:

1. Search for ‘Flutter run additional args’ in your user settings.
2. Add –no-sound-null-safety to the list of arguments.

Testing Configuration

For tests, you’ll want to add a similar configuration:

In IntelliJ/Android Studio

You can follow these steps to enable unsound null safety in test configurations for IntelliJ/Android Studio:

1. Edit your run configurations.
2. Add the –no-sound-null-safety argument under ‘Additional args’.

In Visual Studio Code

Here’s how to set it up for test configuration in Visual Studio Code:

1. Search for ‘Flutter test additional args’ in your user settings.
2. Add –no-sound-null-safety to the list of arguments.

Android Studio Specific Setup

In Android Studio specifically, you can follow these steps:

1. Go to Run → Edit Configurations.
2. Click on ‘Add Additional Run args’ and enter –no-sound-null-safety.

This guide should help resolve the issue of not being able to run your Flutter application due to unsound null safety. If you have any issues or questions, it’s always best to refer back to the official Flutter documentation for the most up-to-date information and guidance.