material library

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.

Constructors

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

Properties

action → SnackBarAction: (optional) An action that the user can take based on the snack bar. [...]
final
animation → Animation<double>: The animation driving the entrance and exit of the snack bar.
final
backgroundColor → Color: The Snackbar's background color. By default the color is dark grey.
final
content → Widget: The primary content of the snack bar. [...]
final
duration → Duration: The amount of time the snack bar should be displayed. [...]
final
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

Methods

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget. [...]
override
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. [...]
inherited
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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String: Returns 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 ==(dynamic other) → bool: The equality operator. [...]
inherited

Static Methods

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