Flutter offers an efficient way to enhance user interaction through Modal Bottom Sheet. A Modal Bottom Sheet slides up from the bottom of the screen to reveal more content or actions without navigating away from the current view. It is a flexible and powerful feature that can be customized to match your app’s design and user experience. This article covers how to accomplish a Custom ModalBottomSheet in Flutter.

In addition, with attributes like rounded corners, a fixed dismissal behavior, and custom content. We’ll walk through a practical example to learn more about how to style and implement a custom modalbottomsheet in flutter.

What is a Modal Bottom Sheet?

A Modal Bottom Sheet in Flutter is a widget that can be displayed on top of the main content of your app. It temporarily interrupts the user’s interaction and is often used for actions like displaying options, getting user inputs, or presenting extra information.

In Flutter, the function showModalBottomSheet is used to trigger the modal bottom sheet. It provides several customizable properties that allow you to control its appearance and behavior.

Expected Output

Key Attributes of showModalBottomSheet

Let’s break down some important attributes of the showModalBottomSheet function that make customization easier.

• context: The BuildContext of the current widget tree where the modal will appear.
• isScrollControlled: If true, the bottom sheet can occupy the full height of the screen when necessary, making it adaptable to content length.
• isDismissible: Controls whether the bottom sheet can be dismissed by tapping outside of it. Setting this to false ensure that the sheet will not be dismissed unless explicitly closed.
• shape: Allows customization of the bottom sheet’s shape. In our example, we used RoundedRectangleBorder to give it rounded corners at the top.
• builder: Defines the widget that will be displayed inside the modal bottom sheet.

Custom ModalBottomSheet in Flutter

 showModalBottomSheet(
              context: context,
              isScrollControlled: true,
              isDismissible: false,  
              shape: const RoundedRectangleBorder(
                borderRadius: BorderRadius.vertical(
                  top: Radius.circular(30),
                ),
              ),
              builder: (_) => _buildBottomSheetContent(context),
            );

Customizing the Content

In this example, we used a combination of widgets inside the bottom sheet to make it interactive and visually appealing:

• Stack Layout: This allows us to layer elements on top of each other, like the floating avatar above the bottom sheet.
• ListTile: We used ListTile to present actionable items (Edit, Share) with an icon and text. This creates a clean and intuitive UI for users.

Enhancements to Consider

1. Responsive Design: Ensure your bottom sheet looks great on all device sizes by using MediaQuery for dynamic positioning.
2. Theming: Leverage Flutter Theme to allow easy customization of colors and fonts in different contexts (e.g., light and dark modes).
3. Interaction Feedback: You can add interactive elements like buttons, forms, or sliders based on your app’s functionality.

Final Thoughts

The ability to create Custom Modal Bottom Sheets in Flutter opens up a world of possibilities for enhancing user experience. Whether it’s for providing additional information or offering quick actions, these sheets can be designed and styled to match your app’s branding and functionality. By using attributes like isScrollControlled, isDismissible, and shape, you can create a custom modalbottomsheet in Flutter that is both functional and visually appealing.

Conclusion

Customizing modal bottom sheets in Flutter allows you to give your app a polished and interactive user interface. With simple code adjustments and a focus on user experience, you can create a powerful bottom sheet that seamlessly integrates into your app’s flow.

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GitHub Repo

https://github.com/nbnD/custom_bottomsheet