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.onAbilityCreateonAbilityCreate(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(‘AbilityLifecycleCallbackonAbilityCreate.’);}};2.AbilityLifecycleCallback.onWindowStageCreateonWindowStageCreate(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(‘AbilityLifecycleCallbackonAbilityCreate.’);}};3.AbilityLifecycleCallback.onWindowStageCreateonWindowStageCreate(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(‘AbilityLifecycleCallbackonWindowStageActive.’);}};4.AbilityLifecycleCallback.onWindowStageInactiveonWindowStageInactive(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(‘AbilityLifecycleCallbackonWindowStageInactive.’);}};5.AbilityLifecycleCallback.onWindowStageDestroyonWindowStageDestroy(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(‘AbilityLifecycleCallbackonWindowStageInactive.’);}};6.AbilityLifecycleCallback.onWindowStageDestroyonWindowStageDestroy(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(‘AbilityLifecycleCallbackonWindowStageInactive.’);}};7.AbilityLifecycleCallback.onWindowStageDestroyonWindowStageDestroy(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(‘AbilityLifecycleCallbackonWindowStageInactive.’);}};8.AbilityLifecycleCallback.onWindowStageDestroyonWindowStageDestroy(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(‘AbilityLifecycleCallbackonAbilityBackground.’);}};9.AbilityLifecycleCallback.onAbilityContinueonAbilityContinue(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(‘AbilityLifecycleCallbackonAbilityContinue.’);}};**AbilityLifecycleCallback使用**示例MyFirstAbility.tsimportAbilityLifecycleCallbackfrom ‘ohos.app.ability.AbilityLifecycleCallback’;importAbilityStagefrom ‘ohos.app.ability.AbilityStage’;importUIAbilityfrom ‘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(‘AbilityLifecycleCallbackonAbilityCreate.’);},onWindowStageCreate(ability,windowStage){console.log(‘AbilityLifecycleCallbackonWindowStageCreate.’);},onWindowStageActive(ability,windowStage){console.log(‘AbilityLifecycleCallbackonWindowStageActive.’);},onWindowStageInactive(ability,windowStage){console.log(‘AbilityLifecycleCallbackonWindowStageInactive.’);},onWindowStageDestroy(ability,windowStage){console.log(‘AbilityLifecycleCallbackonWindowStageDestroy.’);},onAbilityDestroy(ability){console.log(‘AbilityLifecycleCallbackonAbilityDestroy.’);},onAbilityForeground(ability){console.log(‘AbilityLifecycleCallbackonAbilityForeground.’);},onAbilityBackground(ability){console.log(‘AbilityLifecycleCallbackonAbilityBackground.’);},onAbilityContinue(ability){console.log(‘AbilityLifecycleCallbackonAbilityContinue.’);}};exportdefaultclassMyFirstAbilityextendsUIAbility{onCreate(){console.log(‘MyAbilityStageonCreate’);// 1.通过context属性获取applicationContextlet applicationContextthis.context.getApplicationContext();// 2.通过applicationContext注册监听应用内生命周期try{globalThis.lifecycleIdapplicationContext.on(‘abilityLifecycle’,abilityLifecycleCallback);console.log(‘registerAbilityLifecycleCallback lifecycleId:${globalThis.lifecycleId}’);}catch(paramError){console.log(‘error:’paramError.code’,’paramError.message);}}}MySecondAbility.tsimportUIAbilityfrom ‘ohos.app.ability.UIAbility’;exportdefaultclassMySecondAbilityextendsUIAbility{onDestroy(){let applicationContextthis.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.’);}});}}结尾这里整理了一份《鸿蒙HarmonyOS开发学习指南》希望能对那些想要学习鸿蒙但是有没有方向的人提供一点帮助。由于文档内容过多因此为了避免影响到大家的阅读体验在此只以截图展示部分内容详细完整版的看文末有免费的获取方式《鸿蒙HarmonyOS开发学习指南》第一章 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