BottomAppBar class Null safety

A container that is typically used with Scaffold.bottomNavigationBar, and can have a notch along the top that makes room for an overlapping FloatingActionButton.

Typically used with a Scaffold and a FloatingActionButton.

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

See also:

Inheritance

Constructors

BottomAppBar({Key? key, Color? color, double? elevation, NotchedShape? shape, Clip clipBehavior, double notchMargin, Widget? child})
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. [...]
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree. [...]
final, inherited
notchMargin double
The margin between the FloatingActionButton and the BottomAppBar's notch. [...]
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
shape NotchedShape?
The notch that is made for the floating action button. [...]
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. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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. [...]
@nonVirtual, inherited