程序包 ohos.aafwk.ability

接口 LifecycleStateObserver

所有超级接口:

ILifecycleObserver

public interface LifecycleStateObserver
extends ILifecycleObserver

Observes specific lifecycle events and responds to lifecycle changes.

Lifecycle dispatches a lifecycle change event to a registered LifecycleStateObserver. LifecycleStateObserver observes lifecycle changes, and onStateChanged(ohos.aafwk.ability.Lifecycle.Event,ohos.aafwk.content.Intent) is called back to process lifecycle change events. Same as LifecycleObserver, the LifecycleStateObserver interface can also implement lifecycle callbacks for Ability and AbilitySlice. LifecycleStateObserver is more suitable to act as the observer of a specific lifecycle event. For example, ActiveData can use this interface to observe lifecycle changes of an ability or ability slice. The system stops notifying LifecycleStateObserver when the ability or ability slice enters the BACKGROUND state and resumes the notification when the state changes to ACTIVE.

You can call Lifecycle#addObserver(ILifecycleObserver) to register a LifecycleStateObserver with Lifecycle. The onStateChanged(ohos.aafwk.ability.Lifecycle.Event,ohos.aafwk.content.Intent) method is called back after the callback methods in Ability and AbilitySlice.

LifecycleStateObserver is more flexible than LifecycleObserver. It can observe changes of all lifecycle states or a specific state. You are advised to use LifecycleStateObserver as the observer to observe state changes in both the foreground and background.

从以下版本开始:

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另请参阅:

Lifecycle, ILifecycleObserver, LifecycleObserver

SystemCapability

SystemCapability.Aafwk#ABILITY

方法概要

限定符和类型	方法	说明
void	onStateChanged(Lifecycle.Event event, Intent intent)	Called back in response to a lifecycle change.

方法详细资料

onStateChanged

void onStateChanged(Lifecycle.Event event,
                    Intent intent)

Called back in response to a lifecycle change. This method is triggered by a registered LifecycleStateObserver each time the lifecycle state changes.

参数:

event - Indicates the lifecycle event.

intent - Indicates the state change information.

从以下版本开始:

1