harmony 鸿蒙@ohos.brightness (Screen Brightness)

  • 2022-08-09
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@ohos.brightness (Screen Brightness)

The brightness module provides an API for setting the screen brightness.

NOTE

  • The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.

  • The APIs provided by this module are system APIs.

Modules to Import

import brightness from '@ohos.brightness';

brightness.setValue

setValue(value: number): void

Sets the screen brightness.

System API: This is a system API.

System capability: SystemCapability.PowerManager.DisplayPowerManager

Parameters

Name Type Mandatory Description
value number Yes Brightness value. The value ranges from 0 to 255.

Error codes

For details about the error codes, see Screen Brightness Error Codes.

ID Error Message
4700101 If connecting to the service failed.

Example

try {
    brightness.setValue(128);
} catch(err) {
    console.error('set brightness failed, err: ' + err);
}

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