# @ohos.application.AbilityLifecycleCallback (AbilityLifecycleCallback)

AbilityLifecycleCallback模块提供应用上下文ApplicationContext的生命周期监听方法的回调类的能力，包括onAbilityCreate、onWindowStageCreate、onWindowStageDestroy等方法。

> **说明：**
> 
> 本模块首批接口从API version 9 开始支持，从API version 9废弃，替换模块为[@ohos.app.ability.AbilityLifecycleCallback](js-apis-app-ability-abilityLifecycleCallback.md)。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

```ts
import AbilityLifecycleCallback from "@ohos.application.AbilityLifecycleCallback";
```


## AbilityLifecycleCallback.onAbilityCreate

onAbilityCreate(ability: Ability): 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 | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 | 


## AbilityLifecycleCallback.onWindowStageCreate

onWindowStageCreate(ability: Ability, 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 | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 |  
  | windowStage | [window.WindowStage](js-apis-window.md#windowstage9) | 是 | 当前WindowStage对象 |    


## AbilityLifecycleCallback.onWindowStageActive

onWindowStageActive(ability: Ability, windowStage: window.WindowStage): void;

注册监听应用上下文的生命周期后，在windowStage获焦时触发回调。

**系统能力**：SystemCapability.Ability.AbilityRuntime.AbilityCore

**参数：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | ability | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 |  
  | windowStage | [window.WindowStage](js-apis-window.md#windowstage9) | 是 | 当前WindowStage对象 |    


## AbilityLifecycleCallback.onWindowStageInactive

onWindowStageInactive(ability: Ability, 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：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | ability | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 |  
  | windowStage | [window.WindowStage](js-apis-window.md#windowstage9) | 是 | 当前WindowStage对象 |  


## AbilityLifecycleCallback.onWindowStageDestroy

onWindowStageDestroy(ability: Ability, 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 | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 |  
  | windowStage | [window.WindowStage](js-apis-window.md#windowstage9) | 是 | 当前WindowStage对象 |  


## AbilityLifecycleCallback.onAbilityDestroy

onAbilityDestroy(ability: Ability): 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 | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 | 


## AbilityLifecycleCallback.onAbilityForeground

onAbilityForeground(ability: Ability): 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 | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 | 


## AbilityLifecycleCallback.onAbilityBackground

onAbilityBackground(ability: Ability): 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 | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 | 


## AbilityLifecycleCallback.onAbilityContinue

onAbilityContinue(ability: Ability): 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：**

  | 参数名 | 类型 | 必填 | 说明 | 
  | -------- | -------- | -------- | -------- |
  | ability | [Ability](js-apis-application-ability.md#Ability) | 是 | 当前Ability对象 | 

**示例：**
    

```ts
import AbilityStage from "@ohos.application.AbilityStage";

var lifecycleid;

export default class MyAbilityStage extends AbilityStage {
    onCreate() {
        console.log("MyAbilityStage onCreate")
        let AbilityLifecycleCallback  =  {
            onAbilityCreate(ability){
                console.log("AbilityLifecycleCallback onAbilityCreate ability:" + JSON.stringify(ability));        
            },
            onWindowStageCreate(ability, windowStage){
                console.log("AbilityLifecycleCallback onWindowStageCreate ability:" + JSON.stringify(ability)); 
                console.log("AbilityLifecycleCallback onWindowStageCreate windowStage:" + JSON.stringify(windowStage));           
            },
            onWindowStageActive(ability, windowStage){
                console.log("AbilityLifecycleCallback onWindowStageActive ability:" + JSON.stringify(ability)); 
                console.log("AbilityLifecycleCallback onWindowStageActive windowStage:" + JSON.stringify(windowStage));           
            },
            onWindowStageInactive(ability, windowStage){
                console.log("AbilityLifecycleCallback onWindowStageInactive ability:" + JSON.stringify(ability));
                console.log("AbilityLifecycleCallback onWindowStageInactive windowStage:" + JSON.stringify(windowStage));  
            },
            onWindowStageDestroy(ability, windowStage){
                console.log("AbilityLifecycleCallback onWindowStageDestroy ability:" + JSON.stringify(ability));
                console.log("AbilityLifecycleCallback onWindowStageDestroy windowStage:" + JSON.stringify(windowStage));  
            },
            onAbilityDestroy(ability){
                console.log("AbilityLifecycleCallback onAbilityDestroy ability:" + JSON.stringify(ability));             
            },
            onAbilityForeground(ability){
                console.log("AbilityLifecycleCallback onAbilityForeground ability:" + JSON.stringify(ability));             
            },
            onAbilityBackground(ability){
                console.log("AbilityLifecycleCallback onAbilityBackground ability:" + JSON.stringify(ability));              
            },
            onAbilityContinue(ability){
                console.log("AbilityLifecycleCallback onAbilityContinue ability:" + JSON.stringify(ability));
            }
        }
        // 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
        lifecycleid = applicationContext.registerAbilityLifecycleCallback(AbilityLifecycleCallback);
        console.log("registerAbilityLifecycleCallback number: " + JSON.stringify(lifecycleid));       
    }
    onDestroy() {
        let applicationContext = this.context.getApplicationContext();
        applicationContext.unregisterAbilityLifecycleCallback(lifecycleid, (error, data) => {
        console.log("unregisterAbilityLifecycleCallback success, err: " + JSON.stringify(error));
        });
    }
}
```