f8.1/sdk/dart/package-fuchsia_modular_lifecycle/Lifecycle-class.md

# Lifecycle class






    *[<Null safety>](https://dart.dev/null-safety)*



<p>Allows running components to be notified when lifecycle events happen in the
system.</p>




## Constructors

[Lifecycle](../package-fuchsia_modular_lifecycle/Lifecycle/Lifecycle.md) ()

Obtains an instance of the shared <a href="../package-fuchsia_modular_lifecycle/Lifecycle-class.md">Lifecycle</a> instance.   _factory_


## Properties

##### [hashCode](../package-fuchsia_modular_lifecycle/Lifecycle/hashCode.md) &#8594; int



The hash code for this object.  
_<span class="feature">read-only</span><span class="feature">inherited</span>_



##### [runtimeType](../package-fuchsia_modular_lifecycle/Lifecycle/runtimeType.md) &#8594; Type



A representation of the runtime type of the object.  
_<span class="feature">read-only</span><span class="feature">inherited</span>_





## Methods

##### [addTerminateListener](../package-fuchsia_modular_lifecycle/Lifecycle/addTerminateListener.md)(Future&lt;void> listener()) bool



Adds a terminate <code>listener</code> which will be called when the system starts to
shutdown this process. Returns <code>false</code> if this listener was already added.  




##### [noSuchMethod](../package-fuchsia_modular_lifecycle/Lifecycle/noSuchMethod.md)(Invocation invocation) dynamic



Invoked when a non-existent method or property is accessed.  
_<span class="feature">inherited</span>_



##### [toString](../package-fuchsia_modular_lifecycle/Lifecycle/toString.md)() String



A string representation of this object.  
_<span class="feature">inherited</span>_





## Operators

##### [operator ==](../package-fuchsia_modular_lifecycle/Lifecycle/operator_equals.md)(Object other) bool



The equality operator.  
_<span class="feature">inherited</span>_







## Static Methods

##### [enableLifecycleEvents](../package-fuchsia_modular_lifecycle/Lifecycle/enableLifecycleEvents.md)([Outgoing](../package-fuchsia_services_services/Outgoing-class.md) outgoing) void



Initializes the shared <a href="../package-fuchsia_modular_lifecycle/Lifecycle-class.md">Lifecycle</a> instance. This is required before
Lifecycle can be constructed.