一、说明
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、onWindowStageActive、onWindowStageInactive、onWindowStageDestroy、onAbilityDestroy、onAbilityForeground、onAbilityBackground、onAbilityContinue方法。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。
二、导入模块
import AbilityLifecycleCallback from ‘@ohos.app.ability.AbilityLifecycleCallback’;
1.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：
 

示例：
let abilityLifecycleCallback = {
onAbilityCreate(ability){
console.log(‘AbilityLifecycleCallback onAbilityCreate.’);
}
};
2.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：
 

示例：
let abilityLifecycleCallback = {
onAbilityCreate(ability){
console.log(‘AbilityLifecycleCallback onAbilityCreate.’);
}
};
3.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：
 

示例：
let abilityLifecycleCallback = {
onWindowStageActive(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageActive.’);
}
};
4.AbilityLifecycleCallback.onWindowStageInactive
onWindowStageInactive(ability: UIAbility, windowStage: window.WindowStage): void;
注册监听应用上下文的生命周期后，在windowStage失焦时触发回调。
系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore
参数：
 

示例：
let abilityLifecycleCallback = {
onWindowStageInactive(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageInactive.’);
}
};
5.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：
 

示例：
let abilityLifecycleCallback = {
onWindowStageInactive(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageInactive.’);
}
};
6.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：
 

示例：
let abilityLifecycleCallback = {
onWindowStageInactive(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageInactive.’);
}
};
7.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：
 

示例：
let abilityLifecycleCallback = {
onWindowStageInactive(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageInactive.’);
}
};
8.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：
 

示例：
let abilityLifecycleCallback = {
onAbilityBackground(ability){
console.log(‘AbilityLifecycleCallback onAbilityBackground.’);
}
};
9.AbilityLifecycleCallback.onAbilityContinue
onAbilityContinue(ability: UIAbility): void;
注册监听应用上下文的生命周期后，在ability迁移时触发回调。
系统能力：SystemCapability.Ability.AbilityRuntime.AbilityCore
参数：
 

示例：
let abilityLifecycleCallback = {
onAbilityContinue(ability){
console.log(‘AbilityLifecycleCallback onAbilityContinue.’);
}
};
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’;

// 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 = {
onAbilityCreate(ability){
console.log(‘AbilityLifecycleCallback onAbilityCreate.’);
},
onWindowStageCreate(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageCreate.’);
},
onWindowStageActive(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageActive.’);
},
onWindowStageInactive(ability, windowStage){
console.log(‘AbilityLifecycleCallback onWindowStageInactive.’);
},
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.’);
},
onAbilityContinue(ability){
console.log(‘AbilityLifecycleCallback onAbilityContinue.’);
}
};

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 {
globalThis.lifecycleId = applicationContext.on(‘abilityLifecycle’, abilityLifecycleCallback);
console.log(‘registerAbilityLifecycleCallback lifecycleId: ${globalThis.lifecycleId}’);
} catch (paramError) {
console.log(‘error: ’ + paramError.code + ’ ,’ + paramError.message);
}
}
}
MySecondAbility.ts
import UIAbility from ‘@ohos.app.ability.UIAbility’;

export default class MySecondAbility extends UIAbility {
onDestroy() {
let applicationContext = this.context.getApplicationContext();
// 3.通过applicationContext注销监听应用内生命周期
applicationContext.off(‘abilityLifecycle’, globalThis.lifecycleId, (error) => {
if (error.code != 0) {
console.log('unregisterAbilityLifecycleCallback failed, error: ’ + JSON.stringify(error));
} else {
console.log(‘unregisterAbilityLifecycleCallback success.’);
}
});
}
}

本文根据HarmonyOS官方开发文档整理