com.manateeworks

Class CameraManager

java.lang.Object

com.manateeworks.CameraManager

public final class CameraManager
extends java.lang.Object

Represents a static CameraManager class.

Field Summary

Fields

Modifier and Type	Field and Description
static android.hardware.Camera.AutoFocusCallback	afCallback
android.hardware.Camera	camera
com.manateeworks.CameraConfigurationManager	configManager
static float	currentFPS
static boolean	DEBUG
java.util.Timer	focusTimer
android.view.SurfaceHolder	lastHolder
static int	mDesiredHeight
static int	mDesiredWidth
com.manateeworks.PreviewCallback	previewCallback
boolean	previewing
static int	REFOCUSING_DELAY
static boolean	refocusingActive
static java.lang.String	TAG
static boolean	USE_FRONT_CAMERA
static boolean	USE_SAMSUNG_FOCUS_ZOOM_PATCH
static boolean	useBufferedCallback

Method Summary

Modifier and Type	Method and Description
void	closeDriver() Closes the Camera object and releases resources.
static CameraManager	get() Returns the CameraManager object.
android.graphics.Point	getCurrentResolution()
int	getDeviceDefaultOrientation()
float[]	getExposureCompensationRange()
android.graphics.Point	getMaxResolution()
int	getMaxZoom() Gets the maximum zoom level the Camera supports.
android.graphics.Point	getNormalResolution(android.graphics.Point normalRes)
static void	init(android.content.Context context) Initializes a new CameraManager object with the provided Context.
boolean	isTorchAvailable() Checks torch availability.
void	openDriver(android.view.SurfaceHolder holder, boolean isPortrait) Invokes Camera.open and configures the Camera.
android.graphics.Bitmap	renderCroppedGreyscaleBitmap(byte[] data, int width, int height) Converts a YUV format frame to Bitmap grayscale frame.
void	requestAutoFocus(android.os.Handler handler, int message)
void	requestPreviewFrame(android.os.Handler handler, int message) Requests a preview frame.
void	setCameraDisplayOrientation(int cameraId, android.hardware.Camera camera, boolean isPortrait) Sets the camera display orientation.
static void	setDesiredPreviewSize(int width, int height) Select desired camera resolution.
void	setExposureCompensation(float value)
void	setTorch(boolean enabled) Turns the torch on or off.
void	setZoom(int zoom) Sets the Camera zoom level.
void	startFocusing()
void	startPreview() Starts the Camera Preview and starts focusing.
void	stopFocusing()
void	stopPreview() Stops the Camera Preview and stops focusing.
void	updateCameraOrientation(int rotation)

Methods inherited from class java.lang.Object

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

Field Detail

currentFPS

public static float currentFPS

REFOCUSING_DELAY

public static int REFOCUSING_DELAY

USE_SAMSUNG_FOCUS_ZOOM_PATCH

public static boolean USE_SAMSUNG_FOCUS_ZOOM_PATCH

USE_FRONT_CAMERA

public static boolean USE_FRONT_CAMERA

configManager

public final com.manateeworks.CameraConfigurationManager configManager

camera

public android.hardware.Camera camera

previewing

public boolean previewing

useBufferedCallback

public static boolean useBufferedCallback

mDesiredWidth

public static int mDesiredWidth

mDesiredHeight

public static int mDesiredHeight

lastHolder

public android.view.SurfaceHolder lastHolder

focusTimer

public java.util.Timer focusTimer

afCallback

public static android.hardware.Camera.AutoFocusCallback afCallback

refocusingActive

public static boolean refocusingActive

DEBUG

public static boolean DEBUG

TAG

public static java.lang.String TAG

previewCallback

public final com.manateeworks.PreviewCallback previewCallback

Method Detail

setDesiredPreviewSize

public static void setDesiredPreviewSize(int width,
                                         int height)

Select desired camera resolution. Not all devices supports all resolutions, closest available will be chosen. If not selected, closest match to screen resolution will be chosen. High resolutions will slow down scanning process on slower devices.

Parameters:

width - desired preview width

height - desired preview height

getMaxResolution

public android.graphics.Point getMaxResolution()

getCurrentResolution

public android.graphics.Point getCurrentResolution()

getNormalResolution

public android.graphics.Point getNormalResolution(android.graphics.Point normalRes)

init

public static void init(android.content.Context context)

Initializes a new CameraManager object with the provided Context.

Parameters:

context - Activity context

get

public static CameraManager get()

Returns the CameraManager object.

Returns:

CameraManager object

openDriver

public void openDriver(android.view.SurfaceHolder holder,
                       boolean isPortrait)
                throws java.io.IOException

Invokes Camera.open and configures the Camera.

Parameters:

holder - surface holder

isPortrait - true if portrait

Throws:

java.io.IOException - error when camera open fails after multiple tries

getMaxZoom

public int getMaxZoom()

Gets the maximum zoom level the Camera supports.

Returns:

int max zoom level

setZoom

public void setZoom(int zoom)

Sets the Camera zoom level.

Parameters:

zoom - zoom level

isTorchAvailable

public boolean isTorchAvailable()

Checks torch availability.

Returns:

boolean torch availability

setTorch

public void setTorch(boolean enabled)

Turns the torch on or off.

Parameters:

enabled - set to true to turn torch on

getExposureCompensationRange

public float[] getExposureCompensationRange()

setExposureCompensation

public void setExposureCompensation(float value)

closeDriver

public void closeDriver()

Closes the Camera object and releases resources.

startFocusing

public void startFocusing()

stopFocusing

public void stopFocusing()

startPreview

public void startPreview()

Starts the Camera Preview and starts focusing.

stopPreview

public void stopPreview()

Stops the Camera Preview and stops focusing.

requestPreviewFrame

public void requestPreviewFrame(android.os.Handler handler,
                                int message)

Requests a preview frame.

Parameters:

handler - handler to send the frame to

message - message to pass the handler

requestAutoFocus

public void requestAutoFocus(android.os.Handler handler,
                             int message)

getDeviceDefaultOrientation

public int getDeviceDefaultOrientation()

updateCameraOrientation

public void updateCameraOrientation(int rotation)

setCameraDisplayOrientation

public void setCameraDisplayOrientation(int cameraId,
                                        android.hardware.Camera camera,
                                        boolean isPortrait)

Sets the camera display orientation.

Parameters:

cameraId - The ID of the chosen camera.

camera - The Camera object.

isPortrait - true if portrait

renderCroppedGreyscaleBitmap

public android.graphics.Bitmap renderCroppedGreyscaleBitmap(byte[] data,
                                                            int width,
                                                            int height)

Converts a YUV format frame to Bitmap grayscale frame.

Parameters:

data - YUV frame from camera

width - frame width

height - frame height

Returns:

Bitmap the Bitmap object that represents a grayscale frame