Added in API level 28

ImageDecoder.OnHeaderDecodedListener

public static interface ImageDecoder.OnHeaderDecodedListener

android.graphics.ImageDecoder.OnHeaderDecodedListener

Interface for changing the default settings of a decode.

Supply an instance to decodeDrawable or decodeBitmap, which will call onHeaderDecoded (in the same thread) once the size is known. The implementation of onHeaderDecoded can then change the decode settings as desired.

Summary

Public methods

abstract void onHeaderDecoded(ImageDecoder decoder, ImageDecoder.ImageInfo info, ImageDecoder.Source source)

Called by ImageDecoder when the header has been decoded and the image size is known.

Public methods

onHeaderDecoded

Added in API level 28 
public abstract void onHeaderDecoded (ImageDecoder decoder, 
                ImageDecoder.ImageInfo info, 
                ImageDecoder.Source source)

Called by ImageDecoder when the header has been decoded and the image size is known.

Parameters
decoder ImageDecoder: the object performing the decode, for changing its default settings. This value cannot be null.
info ImageDecoder.ImageInfo: information about the encoded image. This value cannot be null.
source ImageDecoder.Source: object that created decoder. This value cannot be null.