How to set Border for Container Widget in Flutter?

Flutter – Container Border

To set border with specific color and width for Container widget, set its decoration property with a BoxDecoration object. Inside BoxDecoration, set border property with specific color and width values.

Sample Code

A quick code snippet to set border for Container widget with specific width and color is

Container(
  decoration: BoxDecoration(
    border: Border.all(color: Colors.grey, width: 5),
  ),
)

Example

In the following example, we create a Flutter Application with a Container widget, and set its border with color of grey and width of 5.

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: 200,
            width: 200,
            alignment: Alignment.center,
            decoration: BoxDecoration(
              border: Border.all(color: Colors.grey, width: 5),
              color: Colors.green[200],
            ),
            child: const Text('Container 1'),
          ),
        ]
      ),
    );
  }
}

Screenshot – iPhone Simulator

Screenshot – Android Emulator

Conclusion

In this Flutter Tutorial, we learned how to set border with specific color and width for Container widget, with examples.