How to set Border Radius for Container in Flutter?

Flutter – Container Border Radius

To set border radius for Container widget, set its decoration property with BoxDecoration where the borderRadius property is set with required value.

Code Snippet

A quick code snippet to set the border radius for a Container widget is

Container(
  decoration: const BoxDecoration(
    borderRadius: BorderRadius.all(Radius.circular(15)),
  ),
)

Example

In the following example, we create a Flutter Application with two Container widgets. The first Container widget is set with a border radius of 15, and the second Container widget is set with a border radius of 25.

main.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Tutorial';

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

class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

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

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: Column(
        children: <Widget>[
          const SizedBox(height: 10,),
          Container(
            height: 150,
            width: 150,
            decoration: const BoxDecoration(
              borderRadius: BorderRadius.all(Radius.circular(15)),
              color: Colors.lime,
            ),
            alignment: Alignment.center,
            child: const Text('Radius 15'),
          ),
          const SizedBox(height: 10,),
          Container(
            height: 150,
            width: 150,
            decoration: const BoxDecoration(
              borderRadius: BorderRadius.all(Radius.circular(25)),
              color: Colors.lime,
            ),
            alignment: Alignment.center,
            child: const Text('Radius 25'),
          ),
        ],
      ),
    );
  }
}

Screenshot – iPhone Simulator

Screenshot – Android Emulator

Conclusion

In this Flutter Tutorial, we learned how to set specific location for the banner message in Banner widget, with examples.