Table of contents
Container class in flutter is a convenience widget that combines common painting, positioning, and sizing of widgets.
A basic container element that stores a widget has a margin, which separates the present container from other contents.
The total container can be given a border of different shapes, for example, rounded rectangles, etc.
What is the Container Widget?
The Container
class in Flutter is a multi-purpose widget that allows you to customize its appearance, dimensions, padding, margin, alignment, decoration, and more. It's like a versatile box that can hold other widgets while providing various styling options.
Key Features and Properties:
Alignment: Use the
alignment
property to control how the child widget is aligned within the container.Padding: Adjust the space inside the container using the
padding
property, This property takes anEdgeInsets
object to define padding values.Margin: Control the space outside the container using the
margin
property, it also accepts anEdgeInsets
object.Decoration: Apply visual decorations such as color, border, shadow, etc., using the
decoration
property.Constraints: Set constraints on the container's dimensions using properties like
width
,height
,constraints
, etc.Transforms: Apply transformations like rotation, scaling, etc., using the
transform
property. This allows for scaling, rotating, translating, etc.Clip Behavior: Control how the container's child is clipped using the
clipBehavior
property.Example:
Container( alignment: Alignment.center, // Center aligns the child widget within the container padding: EdgeInsets.all(16.0), // Adds padding inside the container margin: EdgeInsets.symmetric(vertical: 8.0), // Adds margin around the container width: 200, height: 100,//Sets explicit width and height for the container decoration: BoxDecoration( color: Colors.blue, //Background color of the container borderRadius: BorderRadius.circular(8.0), // Adds rounded corners to the container boxShadow: [ BoxShadow( color: Colors.black.withOpacity(0.3), // Shadow color with opacity blurRadius: 4.0, // Amount of blur for the shadow offset: Offset(2.0, 2.0), // Offset of the shadow (x, y) ), ], ), child: Text( 'Hello, Container!', style: TextStyle(color: Colors.white), ), )