AbilityForegroundStateObserver (系统接口)

定义应用前后台状态监听。

说明：

本模块首批接口从API version 11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。 本模块接口为系统接口。

导入模块

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

属性

系统能力：以下各项对应的系统能力均为SystemCapability.Ability.AbilityRuntime.Core

示例：

import abilityManager from '@ohos.app.ability.abilityManager';
import { BusinessError } from '@ohos.base';

let observer: abilityManager.AbilityForegroundStateObserver = {
    onAbilityStateChanged(abilityStateData) {
        console.log(`onAbilityStateChanged: ${JSON.stringify(abilityStateData)}`);
    },
};
try {
    abilityManager.on('abilityForegroundState', observer);
} catch (paramError) {
    let code = (paramError as BusinessError).code;
    let message = (paramError as BusinessError).message;
    console.error(`error: ${code}, ${message} `);
}