harmony 鸿蒙@ohos.application.Configuration (Configuration)

2025-06-12
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@ohos.application.Configuration (Configuration)

The Configuration module defines environment change information. Configuration is an interface definition and is used only for field declaration.

NOTE

The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version. This module is deprecated since API version 9. You are advised to use @ohos.app.ability.Configuration instead.

Modules to Import

import Configuration from '@ohos.application.Configuration';

Properties

System capability: SystemCapability.Ability.AbilityBase

Name	Type	Readable	Writable	Description
language⁸⁺	string	Yes	Yes	Language of the application, for example, zh.
colorMode⁸⁺	ConfigurationConstant.ColorMode	Yes	Yes	Color mode, which can be COLOR_MODE_LIGHT or COLOR_MODE_DARK. The default value is COLOR_MODE_LIGHT.

For details about the fields, see the ohos.application.Configuration.d.ts file.

Example

import UIAbility from '@ohos.app.ability.UIAbility';
import AbilityConstant from '@ohos.app.ability.AbilityConstant';
import EnvironmentCallback from '@ohos.app.ability.EnvironmentCallback';
import Want from '@ohos.app.ability.Want';
import Window from '@ohos.window';
import { BusinessError } from '@ohos.base';

export default class EntryAbility extends UIAbility {
    onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {
    }

    onDestroy() {
    }

    onWindowStageCreate(windowStage: Window.WindowStage) {
        let envCallback: EnvironmentCallback = {
            onConfigurationUpdated(config) {
                console.info(`envCallback onConfigurationUpdated success: ${JSON.stringify(config)}`);
                let language = config.language;
                let colorMode = config.colorMode;
            },
            onMemoryLevel(level){
                console.log(`onMemoryLevel level: ${JSON.stringify(level)}`);
            }
        };

        let applicationContext = this.context.getApplicationContext();
        try {
            applicationContext.on('environment',envCallback);
        } catch (paramError) {
            console.error(`error: ${(paramError as BusinessError).code}, ${(paramError as BusinessError).message}`);
        }

        windowStage.loadContent('pages/index', (err, data) => {
            if (err.code) {
                console.error(`failed to load the content, error: ${JSON.stringify(err)}`);
                return;
            }
            console.info(`Succeeded in loading the content, data: ${JSON.stringify(data)}`);
        });
    }
}