How to Return Multiple Data from TextFields in Flutter

Learn how to effectively return multiple data values from TextFields in Flutter, ensuring data is passed correctly between screens and displayed in a ListView.
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How to Return Multiple Data from TextFields in Flutter

Building Flutter applications can be an exciting journey, but sometimes we encounter challenges along the way. One common scenario developers face is returning data from one screen to another—especially when dealing with multiple TextFields. In this guide, we'll address the question: How do I return the content of two TextFields from another screen and display that data as cards in a ListView?

Problem Overview

When creating a Flutter app, let's say you're trying to collect user input from two TextFields—one capturing a title and another capturing text. You wish to display the submitted data as cards in a ListView on your home page. However, problems may arise, such as type mismatches, leading to errors like:

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

These errors can be perplexing, but they highlight a common mistake: trying to pass structured data in a way that's incompatible with how you're trying to handle it in your Flutter widgets.

Understanding the Solution

To resolve this issue, we need to ensure that the data passed back from one screen to another is in the correct format. Below, we break down the solution into manageable steps:

Step 1: Update the Submission Function

When the user submits data in the writing page, we want to encode the input into a format that can be neatly processed later. We achieve this by using jsonEncode to convert our data into a JSON String. Here's how you can do that:

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

Step 2: Handle Data on the Home Page

Now that we are sending data in a JSON format, we need to decode it correctly in the home page when we receive it. Use jsonDecode to convert it back into a usable format:

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

Step 3: Display the Data

When displaying the data in your ListView, ensure your DreamCard accepts the correct data type. Since our data structure is a map now, we can adjust the DreamCard constructor as follows:

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

Make sure to access the values correctly:

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

Conclusion

In this post, we learned how to effectively pass and handle multiple TextFields data in a Flutter app. By encoding and decoding the input values as JSON strings, we can ensure flawless data passage between screens. Don't forget to structure your data properly and handle it in a way that suits your application's needs.

With the above steps, you can confidently implement this functionality in your Flutter project. Happy coding!