Using the World Time API in Flutter: Troubleshooting and Solutions

Описание: Discover how to effectively utilize the `World Time API` in your Flutter application and troubleshoot common errors.
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This video is based on the question https://stackoverflow.com/q/67373976/ asked by the user 'mir shahab' ( https://stackoverflow.com/u/8108216/ ) and on the answer https://stackoverflow.com/a/67377651/ provided by the user 'hacker1024' ( https://stackoverflow.com/u/13458266/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Use the World Time API in Flutter: A Guide to Troubleshooting

One of the exciting features you can implement in your Flutter application is the ability to display the current time in a specific city from around the world. By utilizing the World Time API, developers can easily integrate this functionality. However, you might encounter errors when trying to run your code, such as "Invalid radix-10 number." Fear not! This guide will walk you through the problem and demonstrate how to troubleshoot and resolve it effectively.

Understanding the Problem: "Invalid radix-10 number"

When working with APIs, correct syntax is critical for successful requests and responses. The specific error you might see, "Invalid radix-10 number," typically indicates there is an issue with how you've formatted the API call. In your use of the World Time API, the mistake often occurs due to the URL not being formatted correctly.

Example of Incorrect Code

Here's a snippet of code that might produce this error:

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The inclusion of “http://” within the URL is a common mistake that leads to various issues, including parsing errors.

The Solution: Correcting the API Call

To fix the error, you need to modify the URL to remove the protocol. This means you should use only the domain itself ("worldtimeapi.org") without the "http://" part. Here’s the corrected version of the API call:

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Step-by-Step Guide to Implementing the Change

Remove the Protocol: Start by adjusting the Uri.http constructor. Only include the actual domain name (worldtimeapi.org), eliminating the "http://" part.

Test Your Code: After making the change, run your application again. If this adjustment resolves the error, the API response should provide you with the current time for the specified location.

Use the Response: Here’s an example of how you might capture the API response data in your Flutter app:

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Key Points to Remember

API Formatting: Ensure that URLs are free from protocols when utilizing Uri.http() to avoid parsing issues.

Testing: Always test your changes to ensure that the application behaves as expected.

Error Handling: Consider implementing error handling to manage unexpected API responses more gracefully.

Conclusion

In summary, using the World Time API in Flutter can be a rewarding experience that enhances your application's functionality. By adhering to correct formatting practices and understanding error messages, you can avoid common pitfalls. We hope this guide helps you in successfully integrating the API and displaying the time of your specified city. Happy coding!