Enhancing Performance with Custom Widgets in Flutter

Creating custom widgets in Flutter can significantly improve app performance by reducing unnecessary rebuilds and making the codebase cleaner. Custom widgets allow you to isolate different parts of the UI, so only specific widgets rebuild when data changes, leading to smoother interactions and improved efficiency.

Why Use Custom Widgets?

1. Optimized Rebuilds: Custom widgets only rebuild when their specific data changes, avoiding unnecessary work.
2. Reusability: Code encapsulation makes it easier to reuse UI components throughout your app.
3. Cleaner Code: Breaking down complex UIs into smaller, manageable widgets makes your code more readable and maintainable.

Creating a Custom Widget in Flutter

Let’s create a custom widget that displays a styled button with a label and an icon. This widget can be reused in different parts of the app, and since it’s self-contained, it doesn’t affect other widgets.

class CustomButton extends StatelessWidget {
  final String label;
  final IconData icon;
  final VoidCallback onPressed;

  const CustomButton({
    Key? key,
    required this.label,
    required this.icon,
    required this.onPressed,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ElevatedButton.icon(
      onPressed: onPressed,
      icon: Icon(icon),
      label: Text(label),
      style: ElevatedButton.styleFrom(
        padding: EdgeInsets.symmetric(horizontal: 16, vertical: 8),
      ),
    );
  }
}        

Usage of Custom Widgets in Your App

Here’s how you can use the CustomButton widget in your app:

CustomButton(
  label: 'Save',
  icon: Icons.save,
  onPressed: () {
    // Action to perform
  },
);        

This approach keeps the UI modular and efficient, as only the CustomButton widget will rebuild when label or icon changes, minimizing performance overhead.