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
-
- Object
- ChangeNotifier
- KeepAliveHandle
Constructors
Properties
- hashCode → int
-
The hash code for this object.
read-onlyinherited
- hasListeners → bool
- Whether any listeners are currently registered.
- 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.
-
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