How to Change a Text Field's Value After Dismissing a Bottom Sheet in Flutter

Описание: If you're facing issues updating a text field in Flutter after dismissing a bottom sheet, this blog will guide you through the steps to resolve it effectively!
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This video is based on the question https://stackoverflow.com/q/62850236/ asked by the user 'iKreateCode' ( https://stackoverflow.com/u/12491226/ ) and on the answer https://stackoverflow.com/a/62851759/ provided by the user 'timilehinjegede' ( https://stackoverflow.com/u/13452640/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Change a Text Field's Value After Dismissing a Bottom Sheet in Flutter

When developing applications in Flutter, you may encounter scenarios where you need to update a text field's value after an interaction with a bottom sheet. This is a common use case, especially when collecting user responses. However, managing state effectively can be tricky. In this guide, we will explore how to properly update a text field in your Flutter application once you dismiss a bottom sheet.

The Problem

You've designed your application to display a bottom sheet when a text field is tapped. The bottom sheet contains options that, when selected, should update the text field with the corresponding choice. However, after dismissing the bottom sheet, you find that the text field does not reflect the selected value. This could make your app feel unresponsive or poorly designed if not handled correctly.

Here's a brief outline of our Widget functionality:

Display a Bottom Sheet: When you tap the text field, a bottom sheet appears, allowing users to select an option:

None

Yes

No

Dismissing the Bottom Sheet: Upon selection, the bottom sheet should close, and the selected option should be displayed in the text field.

The Solution

To properly implement the required functionality, you will need to pass the context and a controller to your _additionInformation widget. This allows you to manage the state effectively. Below, we’ll walk through the steps to make this work.

Step 1: Update the Widget Declaration

Modify your _additionInformation widget to accept parameters for BuildContext and a TextEditingController.

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

Step 2: Use the Controller in the Text Field

Ensure that you are using the statusController to monitor and update the field's value. Update the onTap method of your TextFormField as follows:

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

Step 3: Create the Controller in Your Main Widget

Ensure you create the TextEditingController in your main widget, such as the ProfileEditPage:

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

Conclusion

By following these steps, you can successfully update the text field in your Flutter application after dismissing a bottom sheet. This not only solves the problem but also enhances the user experience by providing clear, updated feedback based on their selections.

Happy Coding! We hope these guidelines will help streamline your development process. If you have further questions or need additional assistance, feel free to reach out!