BottomAppBar class

A container that is typically used with Scaffold.bottomNavigationBar.

Typically used with a Scaffold and a FloatingActionButton.

link 
Scaffold(
  bottomNavigationBar: BottomAppBar(
    color: Colors.white,
    child: bottomAppBarContents,
  ),
  floatingActionButton: const FloatingActionButton(onPressed: null),
)

This example shows the BottomAppBar, which can be configured to have a notch using the BottomAppBar.shape property. This also includes an optional FloatingActionButton, which illustrates the FloatingActionButtonLocations in relation to the BottomAppBar.
link

To create a local project with this code sample, run:
flutter create --sample=material.BottomAppBar.2 mysample

This example shows Material 3 BottomAppBar with its expected look and behaviors.

This also includes an optional FloatingActionButton, which illustrates the FloatingActionButtonLocation.endContained.

link

To create a local project with this code sample, run:
flutter create --sample=material.BottomAppBar.3 mysample

See also:

Inheritance

Constructors

BottomAppBar({Key? key, Color? color, double? elevation, NotchedShape? shape, Clip clipBehavior = Clip.none, double notchMargin = 4.0, Widget? child, EdgeInsetsGeometry? padding, Color? surfaceTintColor, Color? shadowColor, double? height})
Creates a bottom application bar.
const

Properties

child → Widget?
The widget below this widget in the tree.
final
clipBehavior → Clip
The content will be clipped (or not) according to this option.
final
color → Color?
The bottom app bar's background color.
final
elevation → double?
The z-coordinate at which to place this bottom app bar relative to its parent.
final
hashCode → int
The hash code for this object.
read-onlyinherited
height → double?
The double value used to indicate the height of the BottomAppBar.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
notchMargin → double
The margin between the FloatingActionButton and the BottomAppBar's notch.
final
padding → EdgeInsetsGeometry?
The amount of space to surround the child inside the bounds of the BottomAppBar.
final
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
shadowColor → Color?
The color of the shadow below the app bar.
final
shape → NotchedShape?
The notch that is made for the floating action button.
final
surfaceTintColor → Color?
A custom color for the Material 3 surface-tint elevation effect.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<StatefulWidget>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited