Container Box Shadow - Box Decoration - Flutter

The Flutter Container widget is one of the basic components and provides a lot of features such as background colouring, painting, positioning elements, etc.

In this tutorial, we are going to learn to add Box Shadow to Container. Box shadow is a list of different shadows applied to the Container. We can make any type of shadow we want.

Parameters: Here is the list of Parameters used for BoxShadow

• color(Color): It takes the colour of the shadow.

• offset(Offset): It is the offset of the shadow from its position. The default value is Offset.zero.

• blurRadius(double): It takes the radius up to which it will blur the shadow. The default value is 0.0

• spreadRadius(double): It takes the radius up to which it will spread the shadow. The default value is 0.0.

• blurStyle(BlurStyle): It takes the blur style: The default value is BlurStyle.normal.

Syntax: Create box shadow as follows:

Container(
  width: 200,
  height: 200,
  decoration: BoxDecoration(
    boxShadow: [
      BoxShadow(
        color: Colors.grey.withOpacity(0.7),
        spreadRadius: 10,
        blurRadius: 5,
        offset: const Offset(2, 2), 
      ),
    ],
  )
),

Example 1: In the following example, we have a box shadow around an image.

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'AllAboutFlutter',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      debugShowCheckedModeBanner: false,
      home: const ElevatedButtonTutorial(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Container Box Shadow - Box Decoration'),
      ),
      body: Center(
        child: Container(
          width: 200,
          height: 200,
          decoration: BoxDecoration(
            boxShadow: [
              BoxShadow(
                color: Colors.grey.withOpacity(0.8),
                spreadRadius: 2,
                blurRadius: 10,
                offset: const Offset(0, 0), // changes position of shadow
              ),
            ],
          ),
          child: Image.network(
              "https://images.unsplash.com/photo-1555066931-4365d14bab8c?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1470&q=80"),
        ),
      ),
    );
  }
}

Output

Example 2: In the following example, we have a list of box shadows

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'AllAboutFlutter',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      debugShowCheckedModeBanner: false,
      home: const ElevatedButtonTutorial(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Container Box Shadow - Box Decoration'),
      ),
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(48.0),
          child: Container(
            decoration: BoxDecoration(
              boxShadow: [
                BoxShadow(
                  color: Colors.blueAccent.shade700,
                  offset: const Offset(
                    5.0,
                    5.0,
                  ),
                  blurRadius: 10.0,
                  spreadRadius: 2.0,
                ),
                const BoxShadow(
                  color: Colors.white,
                  offset: Offset(0.0, 0.0),
                  blurRadius: 0.0,
                  spreadRadius: 0.0,
                ),
              ],
            ),
            child: Image.network(
                "https://images.unsplash.com/photo-1555066931-4365d14bab8c?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1470&q=80"),
          ),
        ),
      ),
    );
  }
}

Output

Hence in these ways, we can apply box shadows.