en/flutter/guides/widgets

Flutter Widgets Guide

Flutter widgets are the building blocks of user interfaces. They represent everything from simple elements like text and buttons, to complex layouts and app structures. This guide will introduce you to the basics of widgets and help you get started building your own Flutter apps.

What are Widgets?

Widgets are the fundamental units of UI in Flutter. They can be anything from a single text character to a complex multi-page app. Widgets are reusable and can be combined to create more complex structures.

Types of Widgets

• Basic Widgets: Text, Buttons, Icons, Images
• Layout Widgets: Row, Column, Stack, Container
• Complex Widgets: MaterialApp, MaterialApp, Scaffold, PageView

Getting Started with Widgets

To start working with widgets, you'll first need to set up your Flutter environment. You can find instructions for setting up Flutter in the Flutter Getting Started Guide.

Once you have Flutter set up, you can create a new widget by extending the Widget class. Here's a simple example of a custom widget that displays a button:

class MyButton extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ElevatedButton(
      onPressed: () {
        print('Button tapped!');
      },
      child: Text('Tap Me!'),
    );
  }
}

You can then use your custom widget in your app like this:

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('My App'),
        ),
        body: Center(
          child: MyButton(),
        ),
      ),
    );
  }
}

Widget Properties

Widgets can have properties that you can use to customize their appearance and behavior. Here are some common widget properties:

• Text properties: text, style, textAlign
• Button properties: onPressed, child
• Layout properties: crossAxisAlignment, mainAxisAlignment, padding, margin

Advanced Widgets

As you become more comfortable with the basics of widgets, you can start using more advanced widgets like ListView, GridView, and PageView. These widgets allow you to create complex and dynamic layouts.

For more information on advanced widgets, check out the Widgets Guide on the Flutter website.

Conclusion

Widgets are the backbone of Flutter apps. By understanding the basics of widgets, you can start building beautiful and functional user interfaces. Keep exploring the Flutter documentation and try out different widgets to expand your knowledge and skills. Happy coding!