Скачать или смотреть How to Combine Date and Time in Flutter to Convert to UTC

Discover how to merge date and time variables in Flutter to effectively convert to `UTC` time, enhancing your Flutter applications with precision date handling.
---
This video is based on the question https://stackoverflow.com/q/65585389/ asked by the user 'chichi' ( https://stackoverflow.com/u/12996287/ ) and on the answer https://stackoverflow.com/a/65585688/ provided by the user 'JayDev' ( https://stackoverflow.com/u/2498895/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Flutter: add date and time from two different variables to convert to UTC

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Merging Date and Time in Flutter: Converting to UTC

In today’s fast-paced development world, handling date and time can often be tricky, especially when you want to combine them from different sources. If you're working with Flutter and find yourself in need of merging a date and time picked from different pickers, you're not alone. One common challenge is to combine a selectedDate and selectedTime into a single toUTC variable that represents the correct moment in time. Let's break down how to do this efficiently in Flutter.

The Problem

You might have two separate variables like this:

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

The goal is to create a new variable, var toUTC, that merges these two and maintains the UTC format. The desired outcome is:

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

While you may have tried separating the date and merging it with the time, converting it into UTC might not be straightforward without a well-structured approach.

The Solution

Step 1: Merging Date and Time

To achieve the desired combination of date and time, you can use the DateTime constructor from Dart. Here’s how you can do it:

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

Explanation:

selectedDate.year, selectedDate.month, and selectedDate.day extract the year, month, and day from the selectedDate variable.

selectedTime.hour and selectedTime.minute are used to include the correct time.

This effectively creates a new DateTime object that contains both the accurate date and the set time.

Step 2: Converting to UTC

Now that you have your combined DateTime object (toUTC), converting it to UTC is simple and straightforward. Dart provides a built-in method for this purpose. Here’s how you can convert your toUTC date to the UTC format:

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

This toUtc() method allows you to transform your local DateTime object into its UTC representation seamlessly.

Advanced Option: Using Extensions

If you find yourself needing to perform this operation repeatedly, consider creating an extension for better code organization. Here’s a sample extension that can help with this:

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

Usage:
You can now use this extension to easily combine a date with any time you wish to apply to it, streamlining your code and enhancing readability.

Conclusion

Combining date and time in Flutter can be efficiently handled through the DateTime class and its methods. By following the steps outlined above, you can effortlessly create a UTC-compliant date and time object that meets your application's needs. Whether you're working on a timestamp for data storage or user inputs, having a sound understanding of these operations will undoubtedly enhance your application’s functionality. Happy coding!