1e41f4b71Sopenharmony_ci## AbilityFirstFrameStateObserver(系统接口)
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3e41f4b71Sopenharmony_ci定义Ability首帧绘制完成事件监听对象,可以作为[on](js-apis-app-ability-appManager-sys.md#appmanageronabilityfirstframestate12)的入参监听Ability首帧绘制完成事件。
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5e41f4b71Sopenharmony_ci> **说明:**
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7e41f4b71Sopenharmony_ci> 本模块首批接口从API version 12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。
8e41f4b71Sopenharmony_ci> 本模块接口为系统接口。
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10e41f4b71Sopenharmony_ci### 导入模块
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12e41f4b71Sopenharmony_ci```ts
13e41f4b71Sopenharmony_ciimport { appManager } from '@kit.AbilityKit';
14e41f4b71Sopenharmony_ci```
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16e41f4b71Sopenharmony_ci### 属性
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18e41f4b71Sopenharmony_ci**系统接口**: 此接口为系统接口。
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20e41f4b71Sopenharmony_ci**系统能力**:以下各项对应的系统能力均为SystemCapability.Ability.AbilityRuntime.Core
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22e41f4b71Sopenharmony_ci| 名称                     | 类型                 | 只读 | 必填 | 说明                                                         |
23e41f4b71Sopenharmony_ci| ------------------------ | -------------------- | ---- | ---- | ------------------------------------------------------------ |
24e41f4b71Sopenharmony_ci| onAbilityFirstFrameDrawn | AsyncCallback\<void> | 是   | 否   | Ability首帧绘制完成时执行的回调函数。传入参数类型是[AbilityFirstFrameStateData](js-apis-inner-application-abilityFirstFrameStateData-sys)。 |