KeepAliveHandle class Null safety

A Listenable which can be manually triggered.

Used with KeepAliveNotification objects as their KeepAliveNotification.handle.

For a more convenient way to interact with AutomaticKeepAlive widgets, consider using AutomaticKeepAliveClientMixin, which uses a KeepAliveHandle internally.

Inheritance

Constructors

KeepAliveHandle()

Properties

hashCode int
The hash code for this object.
read-onlyinherited
hasListeners bool
Whether any listeners are currently registered.
protected">@protectedread-onlyinherited
runtimeType Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
protected">@protectedvisibleForTesting">@visibleForTestinginherited
release() → void
Trigger the listeners to indicate that the widget no longer needs to be kept alive.
Deprecated('Use dispose instead. ' 'This feature was deprecated after v3.3.0-0.0.pre.')">@Deprecated('Use dispose instead. ' 'This feature was deprecated after v3.3.0-0.0.pre.')
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
toString() String
A string representation of this object.
inherited

Operators

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