SnackBar class

A lightweight message with an optional action which briefly displays at the bottom of the screen.

To display a snack bar, call Scaffold.of(context).showSnackBar(), passing an instance of SnackBar that describes the message.

To control how long the SnackBar remains visible, specify a duration.

A SnackBar with an action will not time out when TalkBack or VoiceOver are enabled. This is controlled by AccessibilityFeatures.accessibleNavigation.

See also:



SnackBar({Key key, @required Widget content, Color backgroundColor, SnackBarAction action, Duration duration: _kSnackBarDisplayDuration, Animation<double> animation })
Creates a snack bar. [...]


action SnackBarAction
(optional) An action that the user can take based on the snack bar. [...]
animation Animation<double>
The animation driving the entrance and exit of the snack bar.
backgroundColor Color
The Snackbar's background color. By default the color is dark grey.
content Widget
The primary content of the snack bar. [...]
duration Duration
The amount of time the snack bar should be displayed. [...]
hashCode int
The hash code for this object. [...]
read-only, inherited
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


build(BuildContext context) Widget
Describes the part of the user interface represented by this widget. [...]
withAnimation(Animation<double> newAnimation, { Key fallbackKey }) SnackBar
Creates a copy of this snack bar but with the animation replaced with the given animation. [...]
createElement() StatelessElement
Creates a StatelessElement to manage this widget's location in the tree. [...]
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. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
@pragma('vm:entry-point'), inherited
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a string representation of this object.
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a string representation of this node and its descendants. [...]
toStringShallow({String joiner: ', ', DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a one-line detailed description of the object. [...]
toStringShort() String
A short, textual description of this widget.


operator ==(dynamic other) bool
The equality operator. [...]

Static Methods

createAnimationController({TickerProvider vsync }) AnimationController
Creates an animation controller useful for driving a snack bar's entrance and exit animation.