Скачать или смотреть How to Ensure Your Flutter App Stays in PortraitUp Orientation on Samsung Devices

Discover the solution to keep your Flutter app locked in `portraitUp` orientation, even on challenging devices like Samsung smartphones.
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This video is based on the question https://stackoverflow.com/q/73734942/ asked by the user 'Abdullah' ( https://stackoverflow.com/u/15390310/ ) and on the answer https://stackoverflow.com/a/73740791/ provided by the user 'NicolasJvd' ( https://stackoverflow.com/u/13524514/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Keeping Your Flutter App in Portrait Mode

If you've ever faced the frustrating issue of your Flutter application not adhering to the portraitUp orientation, you're not alone. Many developers encounter this problem, especially when deploying their app on various devices, such as Samsung smartphones. In this post, we'll discuss the common problem you might be facing and provide a straightforward solution that you can implement in your Flutter project.

The Problem at Hand

You've already written the essential code to enforce the portraitUp orientation in your Flutter app, using the following snippet in your main.dart file:

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

However, you still find that your app insists on allowing other orientations or perhaps it's not behaving as intended on Samsung devices. This could be a significant hurdle, especially if your app is designed to provide a seamless experience in portrait mode only.

Understanding the Solution

The issue likely arises from the fact that setPreferredOrientations is an asynchronous function. This means it may not complete its execution before the runApp() function is called, leading your app to start running before the orientation preference is set. To resolve this issue, you should ensure that runApp() is only called after the orientation preference has been established.

Step-by-Step Solution

Modify the Initialization Code: You'll want to wrap your runApp() call in a then() callback to ensure it executes only after setPreferredOrientations() has fully executed. Here’s how your code should look:

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

Ensure Proper Function Calls: Notice the WidgetsFlutterBinding.ensureInitialized(); method includes parentheses () to call it properly. This ensures that the Flutter engine is initialized before proceeding, which is essential for the subsequent calls to work correctly.

Testing Your Changes

After making these changes, it's vital to test your app on various devices, particularly those from Samsung, to ensure that the orientation locks as expected. Here are some steps you might follow to effectively test:

Deploy the App: After implementing the changes, deploy your app to a Samsung device or any other device you were having issues with.

Rotate the Device: Try rotating the device while using the app to check if it remains in the portrait orientation.

Check Edge Cases: Test the app in different scenarios, such as after interrupting it via calls or notifications.

Conclusion

With the adjustments laid out above, your Flutter application should now be able to stay locked in the portraitUp orientation, providing a consistent user experience across all devices. Remember that dealing with device-specific behaviors can be tricky, but with careful coding practices like handling asynchronous functions properly, you can overcome these issues effectively.

For any further troubles or questions relating to your Flutter projects, don’t hesitate to reach out to the community or consult the official Flutter documentation. Happy coding!