CameraProvider

class CameraProvider(cameraInstance: CameraInstance)

A class that provides Camera2 API features to any class that implements the CameraInstance interface.

Constructors

CameraProvider

fun CameraProvider(cameraInstance: CameraInstance)

Types

OPTIONS

object OPTIONS

Options for the camera image.

Functions

captureImageWithPreviewExtraction

fun captureImageWithPreviewExtraction(): Bitmap?

Captures the current frame of the previewTextureView and returns it as a Bitmap.

chooseOptimalSize

private fun chooseOptimalSize(choices: Array<Size>, textureViewWidth: Int, textureViewHeight: Int, maxWidth: Int, maxHeight: Int, aspectRatio: Size): Size?

Helper method for choosing a Size of a given set of choices, which best fits the given constraints.

createCameraCaptureSession

private fun createCameraCaptureSession()

Creates a captureSession on previewTextureView, using previewRequestBuilder.

initializeTextureView

private fun initializeTextureView()

Initializes previewTextureView and sets the SurfaceTextureListener.

openCamera

fun openCamera(width: Int, height: Int)

Opens the camera with the provided width and height if Manifest.permission.CAMERA is granted.

pause

fun pause()

setUpCameraOutputs

private fun setUpCameraOutputs(width: Int, height: Int)

Sets up the camera output by choosing the optimal size from all available cameras.

start

fun start()

Starts the camera preview on previewTextureView.

stop

fun stop()

Properties

private var ca: Activity?

The Activity of the CameraInstance

cameraCaptureSessionStateCallback

private var cameraCaptureSessionStateCallback: CameraCaptureSession.StateCallback?

Callback for handling all state changes of captureSession.

cameraDevice

private var cameraDevice: CameraDevice? = null

The open camera

cameraDeviceStateCallback

private var cameraDeviceStateCallback: CameraDevice.StateCallback?

Callback for handling all state changes of the open camera.

cameraId

private lateinit var cameraId: String

The physical camera id

cameraOpenCloseLock

private var cameraOpenCloseLock: Semaphore

Prevents closing the app without closing the camera first

captureSession

private var captureSession: CameraCaptureSession? = null

The active camera capture session

private var ci: CameraInstance?

The CameraInstance passed through the constructor

imageReader

private var imageReader: ImageReader? = null

Handler for still image capture

previewRequest

private lateinit var previewRequest: CaptureRequest

The CaptureRequest to get camera images for the preview

previewRequestBuilder

private lateinit var previewRequestBuilder: CaptureRequest.Builder

The builder for previewRequest

previewSize

private lateinit var previewSize: Size

The Size of the camera preview image

previewTextureView

private var previewTextureView: TextureView? = null

The TextureView, on which the camera preview image will be displayed

surfaceTexture

private var surfaceTexture: SurfaceTexture? = null