@ohos.app.ability.abilityLifecycleCallback (AbilityLifecycleCallback)

AbilityLifecycleCallback模块提供应用上下文ApplicationContext的生命周期发生变化时触发相应回调的能力，包括onAbilityCreate、onWindowStageCreate、onWindowStageDestroy、onAbilityDestroy、onAbilityForeground、onAbilityBackground。

说明：

本模块首批接口从API version 9 开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。 本模块接口仅可在Stage模型下使用。

导入模块

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';

AbilityLifecycleCallback.onAbilityCreate

onAbilityCreate(ability: UIAbility): void;

注册监听应用上下文的生命周期后，在ability创建时触发回调。

系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore

参数：

参数名	类型	必填	说明
ability	UIAbility	是	当前Ability对象

示例：

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';

let abilityLifecycleCallback: AbilityLifecycleCallback =  {
    onAbilityCreate(ability){
        console.log('AbilityLifecycleCallback onAbilityCreate.');
    }
};

AbilityLifecycleCallback.onWindowStageCreate

onWindowStageCreate(ability: UIAbility, windowStage: window.WindowStage): void;

注册监听应用上下文的生命周期后，在windowStage创建时触发回调。

系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore

参数：

参数名	类型	必填	说明
ability	UIAbility	是	当前Ability对象
windowStage	window.WindowStage	是	当前WindowStage对象

示例：

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';

let abilityLifecycleCallback: AbilityLifecycleCallback =  {
    onWindowStageCreate(ability, windowStage){
        console.log('AbilityLifecycleCallback onWindowStageCreate.');
    }
};

AbilityLifecycleCallback.onWindowStageDestroy

onWindowStageDestroy(ability: UIAbility, windowStage: window.WindowStage): void;

注册监听应用上下文的生命周期后，在windowStage销毁时触发回调。

系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore

参数：

参数名	类型	必填	说明
ability	UIAbility	是	当前Ability对象
windowStage	window.WindowStage	是	当前WindowStage对象

示例：

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';

let abilityLifecycleCallback: AbilityLifecycleCallback =  {
    onWindowStageDestroy(ability, windowStage){
        console.log('AbilityLifecycleCallback onWindowStageDestroy.');
    }
};

AbilityLifecycleCallback.onAbilityDestroy

onAbilityDestroy(ability: UIAbility): void;

注册监听应用上下文的生命周期后，在ability销毁时触发回调。

系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore

参数：

参数名	类型	必填	说明
ability	UIAbility	是	当前Ability对象

示例：

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';

let abilityLifecycleCallback: AbilityLifecycleCallback =  {
    onAbilityDestroy(ability){
        console.log('AbilityLifecycleCallback onAbilityDestroy.');
    }
};

AbilityLifecycleCallback.onAbilityForeground

onAbilityForeground(ability: UIAbility): void;

注册监听应用上下文的生命周期后，在ability的状态从后台转到前台时触发回调。

系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore

参数：

参数名	类型	必填	说明
ability	UIAbility	是	当前Ability对象

示例：

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';

let abilityLifecycleCallback: AbilityLifecycleCallback =  {
    onAbilityForeground(ability){
        console.log('AbilityLifecycleCallback onAbilityForeground.');
    }
};

AbilityLifecycleCallback.onAbilityBackground

onAbilityBackground(ability: UIAbility): void;

注册监听应用上下文的生命周期后，在ability的状态从前台转到后台时触发回调。

系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore

参数：

参数名	类型	必填	说明
ability	UIAbility	是	当前Ability对象

示例：

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';

let abilityLifecycleCallback: AbilityLifecycleCallback =  {
    onAbilityBackground(ability){
        console.log('AbilityLifecycleCallback onAbilityBackground.');
    }
};

AbilityLifecycleCallback使用

示例：

MyFirstAbility.ts

import AbilityLifecycleCallback from '@ohos.app.ability.AbilityLifecycleCallback';
import AbilityStage from '@ohos.app.ability.AbilityStage';
import UIAbility from '@ohos.app.ability.UIAbility';
import { GlobalContext } from '../GlobalContext'

// 声明ability生命周期回调，需配置所有回调后才可以在applicationContext注册
let abilityLifecycleCallback: AbilityLifecycleCallback = {
    onAbilityCreate(ability){
        console.log('AbilityLifecycleCallback onAbilityCreate.');
    },
    onWindowStageCreate(ability, windowStage){
        console.log('AbilityLifecycleCallback onWindowStageCreate.');
    },
    onWindowStageDestroy(ability, windowStage){
        console.log('AbilityLifecycleCallback onWindowStageDestroy.');
    },
    onAbilityDestroy(ability){
        console.log('AbilityLifecycleCallback onAbilityDestroy.');
    },
    onAbilityForeground(ability){
        console.log('AbilityLifecycleCallback onAbilityForeground.');
    },
    onAbilityBackground(ability){
        console.log('AbilityLifecycleCallback onAbilityBackground.');
    }
};

export default class MyFirstAbility extends UIAbility {
    onCreate() {
        console.log('MyAbilityStage onCreate');
        // 1.通过context属性获取applicationContext
        let applicationContext = this.context.getApplicationContext();
        // 2.通过applicationContext注册监听应用内生命周期
        try {
            let lifecycleId = applicationContext.on('abilityLifecycle', abilityLifecycleCallback);
            GlobalContext.getContext().setObject("lifecycleId", lifecycleId);
            console.log(`registerAbilityLifecycleCallback lifecycleId: ${globalThis.lifecycleId}`);
        } catch (paramError) {
            console.error(`error: ${paramError.code}, ${paramError.message}`);
        }
    }
}

MySecondAbility.ts

import UIAbility from '@ohos.app.ability.UIAbility';
import { GlobalContext } from '../GlobalContext'

export default class MySecondAbility extends UIAbility {
    onDestroy() {
        let applicationContext = this.context.getApplicationContext();
        let lifecycleId = GlobalContext.getContext().getObject("lifecycleId") as number;
        // 3.通过applicationContext注销监听应用内生命周期
        applicationContext.off('abilityLifecycle', lifecycleId, (error) => {
            if (error && error.code !== 0) {
                console.error(`unregisterAbilityLifecycleCallback fail, error: ${JSON.stringify(error)}`);
            } else {
                console.log('unregisterAbilityLifecycleCallback success.');
            }
        });
    }
}