Interface (ManualExposureQuery)

Describes a manual exposure query object.

NOTE

• The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.
• The initial APIs of this interface are supported since API version 24.

Modules to Import

import { camera } from '@kit.CameraKit';

getSupportedExposureDurationRange²⁴⁺

getSupportedExposureDurationRange(): Array<number>

Obtains the supported manual exposure durations, in microseconds.

Atomic service API: This API can be used in atomic services since API version 24.

System capability: SystemCapability.Multimedia.Camera.Core

Returns

Type	Description
Array<number>	Array of manual exposure durations supported.

Error Codes

For details about the error codes, see Camera Error Codes.

Error Code	Error Message
7400102	peration not allowed, session or inputdevice maybe abnormal.
7400103	Session not config, only throw in session usage.

Example

import { BusinessError } from '@kit.BasicServicesKit';

function getSupportedExposureDurationRange(photoSession: camera.PhotoSession): Array<number> {
  let durationRange: Array<number> = [];
  try {
    durationRange = photoSession.getSupportedExposureDurationRange();
  } catch (error) {
    let err = error as BusinessError;
    console.error(`The getSupportedExposureDurationRange call failed. error code: ${err.code}`);
  }
  return durationRange;
}

getExposureBiasStep²⁴⁺

getExposureBiasStep(): number

Obtains the exposure bias step.

Model restriction: This API can be used only in the stage model.

Atomic service API: This API can be used in atomic services since API version 24.

System capability: SystemCapability.Multimedia.Camera.Core

Returns

Type	Description
number	Exposure bias step.

Error Codes

For details about the error codes, see Camera Error Codes.

Error Code	Error Message
7400102	Operation not allowed, session or inputdevice maybe abnormal.
7400103	Session not config.

Example

import { BusinessError } from '@kit.BasicServicesKit';

function getExposureBiasStep(photoSession: camera.PhotoSession): number {
  let biasStep = 0.0;
  try {
    biasStep = photoSession.getExposureBiasStep();
  } catch (error) {
    let err = error as BusinessError;
    console.error(`The getExposureBiasStep call failed. error code: ${err.code}`);
  }
  return biasStep;
}