To Create your Own Widget in Flutter, Just Follow the Below Steps.

• New Dart file for your widget creation:

To select a folder in your project hierarchy, use the right mouse button.
Choose “New” then “File.”
Enter a file name ending in “.dart,” for example, “my_custom_widget.”

• Open the newly created file and import the necessary packages:

import 'package:flutter/material.dart';
Code language: JavaScript (javascript)

• Define your custom widget by creating a new class that extends StatelessWidget or StatefulWidget:

If your widget doesn’t need to maintain any internal state, extend StatelessWidget:

class MyCustomWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // Widget implementation
  }
}
Code language: JavaScript (javascript)

• If your widget needs to maintain internal state and be updated dynamically, extend StatefulWidget:

class MyCustomWidget extends StatefulWidget {
  @override
  _MyCustomWidgetState createState() => _MyCustomWidgetState();
}

class _MyCustomWidgetState extends State<MyCustomWidget> {
  @override
  Widget build(BuildContext context) {
    // Widget implementation
  }
}
Code language: PHP (php)

• Implement the build method within your custom widget class:

Inside the build method, return the UI representation of your widget by creating and configuring Flutter widgets:

@override
Widget build(BuildContext context) {
  return Container(
    // Widget configuration
  );
}
Code language: JavaScript (javascript)

• Customize your widget by adding child widgets, applying styles, and configuring properties:

The structure and look of your widget can be specified using pre-existing Flutter widgets or by developing a bespoke widget within the build function.
Widgets can be nestled inside of other widgets to make intricate designs and architectures.

• Optionally, add properties to your custom widget for customization:

• Define properties as instance variables within your widget class, and pass values to these properties when using your widget.
• Use these property values within the build method to customize the behavior or appearance of your widget.

• Use your custom widget in other parts of your Flutter app:

• Import the file where your custom widget is defined.
• Add an instance of your custom widget to the widget tree, just like any other Flutter widget:

MyCustomWidget(),

See Output Below