com.otaliastudios.cameraview

Class CameraUtils

java.lang.Object

com.otaliastudios.cameraview.CameraUtils

public class CameraUtils
extends java.lang.Object

Static utilities for dealing with camera I/O, orientations, etc.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CameraUtils.BitmapCallback Receives callbacks about a bitmap decoding operation.

Constructor Summary

Constructors

Constructor and Description
CameraUtils()

Method Summary

Modifier and Type	Method and Description
static void	decodeBitmap(byte[] source) Decodes an input byte array and outputs a Bitmap that is ready to be displayed.
static void	decodeBitmap(byte[] source, CameraUtils.BitmapCallback callback) Decodes an input byte array and outputs a Bitmap that is ready to be displayed.
static android.graphics.Bitmap	decodeBitmap(byte[] source, int maxWidth, int maxHeight, android.graphics.BitmapFactory.Options options) Decodes an input byte array and outputs a Bitmap that is ready to be displayed.
static void	decodeBitmap(byte[] source, int maxWidth, int maxHeight, android.graphics.BitmapFactory.Options options, CameraUtils.BitmapCallback callback) Decodes an input byte array and outputs a Bitmap that is ready to be displayed.
static void	decodeBitmap(byte[] source, int maxWidth, int maxHeight, CameraUtils.BitmapCallback callback) Decodes an input byte array and outputs a Bitmap that is ready to be displayed.
static boolean	hasCameraFacing(android.content.Context context, Facing facing) Determines whether the device has a valid camera sensor with the given Facing value, so that a session can be started.
static boolean	hasCameras(android.content.Context context) Determines whether the device has valid camera sensors, so the library can be used.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CameraUtils

public CameraUtils()

Method Detail

hasCameras

public static boolean hasCameras(android.content.Context context)

Determines whether the device has valid camera sensors, so the library can be used.

Parameters:

context - a valid Context

Returns:

whether device has cameras

hasCameraFacing

public static boolean hasCameraFacing(android.content.Context context,
                                      Facing facing)

Determines whether the device has a valid camera sensor with the given Facing value, so that a session can be started.

Parameters:

context - a valid context

facing - either Facing.BACK or Facing.FRONT

Returns:

true if such sensor exists

decodeBitmap

@WorkerThread
public static void decodeBitmap(byte[] source)

Decodes an input byte array and outputs a Bitmap that is ready to be displayed. The difference with BitmapFactory.decodeByteArray(byte[], int, int) is that this cares about orientation, reading it from the EXIF header.

Parameters:

source - a JPEG byte array

decodeBitmap

public static void decodeBitmap(byte[] source,
                                CameraUtils.BitmapCallback callback)

Decodes an input byte array and outputs a Bitmap that is ready to be displayed. The difference with BitmapFactory.decodeByteArray(byte[], int, int) is that this cares about orientation, reading it from the EXIF header. This is executed in a background thread, and returns the result to the original thread.

Parameters:

source - a JPEG byte array

callback - a callback to be notified

decodeBitmap

public static void decodeBitmap(byte[] source,
                                int maxWidth,
                                int maxHeight,
                                CameraUtils.BitmapCallback callback)

Decodes an input byte array and outputs a Bitmap that is ready to be displayed. The difference with BitmapFactory.decodeByteArray(byte[], int, int) is that this cares about orientation, reading it from the EXIF header. This is executed in a background thread, and returns the result to the original thread. The image is also downscaled taking care of the maxWidth and maxHeight arguments.

Parameters:

source - a JPEG byte array

maxWidth - the max allowed width

maxHeight - the max allowed height

callback - a callback to be notified

decodeBitmap

public static void decodeBitmap(byte[] source,
                                int maxWidth,
                                int maxHeight,
                                android.graphics.BitmapFactory.Options options,
                                CameraUtils.BitmapCallback callback)

Decodes an input byte array and outputs a Bitmap that is ready to be displayed. The difference with BitmapFactory.decodeByteArray(byte[], int, int) is that this cares about orientation, reading it from the EXIF header. This is executed in a background thread, and returns the result to the original thread. The image is also downscaled taking care of the maxWidth and maxHeight arguments.

Parameters:

source - a JPEG byte array

maxWidth - the max allowed width

maxHeight - the max allowed height

options - the options to be passed to decodeByteArray

callback - a callback to be notified

decodeBitmap

@WorkerThread
public static android.graphics.Bitmap decodeBitmap(byte[] source,
                                                                 int maxWidth,
                                                                 int maxHeight,
                                                                 android.graphics.BitmapFactory.Options options)

Decodes an input byte array and outputs a Bitmap that is ready to be displayed. The difference with BitmapFactory.decodeByteArray(byte[], int, int) is that this cares about orientation, reading it from the EXIF header. The image is also downscaled taking care of the maxWidth and maxHeight arguments.

Parameters:

source - a JPEG byte array

maxWidth - the max allowed width

maxHeight - the max allowed height

options - the options to be passed to decodeByteArray