Interface (QuickImageDataHandler)

QuickImageDataHandler is a media asset handler used to customize the media asset processing logic in onDataPrepared.

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 13.

Modules to Import

import { photoAccessHelper } from '@kit.MediaLibraryKit';

onDataPrepared¹³⁺

onDataPrepared(data: T, imageSource: image.ImageSource, map: Map<string, string>): void

Called when the requested image is ready. If an error occurs, data returned by the callback is undefined.

Information returned by map:

Map Key	Description
'quality'	Image quality. The value high means high quality, and low means poor quality.

System capability: SystemCapability.FileManagement.PhotoAccessHelper.Core

Parameters

Name	Type	Mandatory	Description
data	T	Yes	Data of the image asset that is ready. It is of the generic type and supports the Picture type.
imageSource	image.ImageSource	Yes	Data of the image asset that is ready.
map13+	Map<string, string>	Yes	Additional information about the image asset, such as the image quality. Currently, only quality is supported.

Example

import { image } from '@kit.ImageKit';

class MediaHandler implements photoAccessHelper.QuickImageDataHandler<image.Picture> {
  onDataPrepared(data: image.Picture, imageSource: image.ImageSource, map: Map<string, string>) {
    console.info('on image data prepared');
  }
}