Added in API level 33

Builder

class Builder
kotlin.Any
   ↳ android.media.ImageReader.Builder

Builder class for ImageReader objects.

Summary

Public constructors
Builder(width: Int, height: Int)

Constructs a new builder for ImageReader.
Public methods
ImageReader

Builds a new ImageReader object.
ImageReader.Builder

Set the default dataspace passed by the producer.
ImageReader.Builder
setDefaultHardwareBufferFormat(hardwareBufferFormat: Int)

Set the default hardwareBuffer format passed by the producer.
ImageReader.Builder
setImageFormat(imageFormat: Int)

Set the default image format passed by the producer.
ImageReader.Builder
setMaxImages(maxImages: Int)

Set the maximal number of images.
ImageReader.Builder
setUsage(usage: Long)

Set the consumer usage flag.

Public constructors

Builder

Added in API level 33
Builder(
    width: Int, 
    height: Int)

Constructs a new builder for ImageReader.

Parameters
width Int: The default width in pixels that will be passed to the producer. May be overridden by the producer.
Value is 1 or greater
height Int: The default height in pixels that will be passed to the producer. May be overridden by the producer.
Value is 1 or greater

Public methods

build

Added in API level 33
fun build(): ImageReader

Builds a new ImageReader object.

Return
ImageReader The new ImageReader object.
This value cannot be null.

setDefaultDataSpace

Added in API level 33
fun setDefaultDataSpace(dataSpace: Int): ImageReader.Builder

Set the default dataspace passed by the producer. May be overridden by the producer.

This function works together with setDefaultHardwareBufferFormat for an ImageReader instance. Setting at least one of these two replaces setImageFormat function.

Parameters
dataSpace Int: The dataspace of the image that this reader will produce. The default value is DataSpace.DATASPACE_UNKNOWN.
Value is either 0 or a combination of the following:
Return
ImageReader.Builder the builder instance with customized dataspace value.
This value cannot be null.

setDefaultHardwareBufferFormat

Added in API level 33
fun setDefaultHardwareBufferFormat(hardwareBufferFormat: Int): ImageReader.Builder

Set the default hardwareBuffer format passed by the producer. May be overridden by the producer.

This function works together with setDefaultDataSpace for an ImageReader instance. Setting at least one of these two replaces setImageFormat function.

The format of the Image can be overridden after setImageFormat by calling this function and then setDefaultDataSpace functions. Warning: Missing one of callings for initializing or overriding the format may involve undefined behaviors.

Parameters
hardwareBufferFormat Int: The HardwareBuffer format of the image that this reader will produce. The default value is HardwareBuffer.RGBA_8888.
Value is one of the following:
Return
ImageReader.Builder the builder instance with customized hardwareBuffer value.
This value cannot be null.

setImageFormat

Added in API level 33
fun setImageFormat(imageFormat: Int): ImageReader.Builder

Set the default image format passed by the producer. May be overridden by the producer.

setImageFormat function replaces the combination of setDefaultHardwareBufferFormat and setDefaultDataSpace functions. Either this or these two functions must be called to initialize an ImageReader instance.

Parameters
imageFormat Int: The format of the image that this reader will produce. This must be one of the android.graphics.ImageFormat or android.graphics.PixelFormat constants. Note that not all formats are supported, like ImageFormat.NV21. The default value is ImageFormat.UNKNOWN.
Value is one of the following:
Return
ImageReader.Builder the builder instance with customized image format value.
This value cannot be null.

setMaxImages

Added in API level 33
fun setMaxImages(maxImages: Int): ImageReader.Builder

Set the maximal number of images.

Parameters
maxImages Int: The maximum number of images the user will want to access simultaneously. This should be as small as possible to limit memory use. Default value is 1.
Return
ImageReader.Builder the Builder instance with customized usage value.
This value cannot be null.

setUsage

Added in API level 33
fun setUsage(usage: Long): ImageReader.Builder

Set the consumer usage flag.

Parameters
usage Long: The intended usage of the images consumed by this ImageReader. See the usages on HardwareBuffer for a list of valid usage bits. Default value is HardwareBuffer.USAGE_CPU_READ_OFTEN.
Value is either 0 or a combination of the following:
Return
ImageReader.Builder the Builder instance with customized usage value.
This value cannot be null.