Flutter Container – Border Radius

Flutter Container Border Radius

To set specific border radius for Container widget in Flutter, set decoration property of the Container with the required BoxDecoration. BoxDecoration contains borderRadius property.

Syntax

Container (
  decoration: BoxDecoration(
    borderRadius: BorderRadius.circular(20),
  ),
),

Example

Flutter Application with a Container widget.

The border radius of this Container widget is set to 20 pixels circular.

main.dart

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

/// main application widget
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Application';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

/// stateful widget that the main application instantiates
class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

/// private State class that goes with MyStatefulWidget
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Container(
        width: 200,
        height: 200,
        decoration: BoxDecoration(
          border: Border.all(
            color: Colors.black,
            width: 5.0,
            style: BorderStyle.solid
          ),
          borderRadius: BorderRadius.circular(20),
          color: Colors.yellowAccent,
        ),
        child: const Center (
          child: Text('Hello World')
        ),
      ),
    );
  }
}

Screenshot

Set the borderRadius property with BorderRadius.circular(50), and output would be as shown in the following.

Desclaimer: We are not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Google, Apple or Flutter, or any of its subsidiaries or its affiliates. The names Google, Apple and Flutter as well as related names, marks, emblems and images are registered trademarks of their respective owners. This site googleflutter.com covers tutorials related to Flutter developed by Google.