harmony 鸿蒙@ohos.brightness (Screen Brightness)
@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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