B4A Library [Class] CameraEx - Extends the camera library functionality

Erel · Nov 28, 2012

Example based on B4XPages: https://www.b4x.com/android/forum/threads/b4x-b4xpages-barcode-reader.120417/#content

CameraEx class wraps the Camera object and using reflection and other code it extends its functionality.

CameraEx class requires Android 2.3+ and depends on Camera library v2.20+
CameraEx features:

Easily open the back or front camera
Preview images and saved images orientation will match the device orientation (all orientations are supported)
Gives access to Camera.Parameters native class (flashmode, picture size, effects and other settings)
Includes methods to convert preview images to JPEG and to save the taken pictures.
It should be simple to add more methods to this class

See this page for the constant values and other possible methods:
https://developer.android.com/reference/android/hardware/Camera.Parameters.html

Note that you should call CommitParameters after changing one or more parameters.

CameraExClass module is included in the attached example.

V1.30 is attached - Includes various new methods.

v1.20 - Includes all the various posts in this thread as well as AutoFocusAndTakePicture method which first calls AutoFocus and then takes a picture (if AutoFocus was successful).

Edit (06/2018): A new version was uploaded with targetSdkVersion set to 26.

Erel · May 2, 2013

Please try to start new threads for new questions. This thread is quite mixed...

@MotoMusher, try to add a short delay in FocusDone event. You can use CallSubDelayed to call TakePicture.

@padvoud why do you need to call CloseNow?

padvou · May 2, 2013

Erel said:
Please try to start new threads for new questions. This thread is quite mixed...

@MotoMusher, try to add a short delay in FocusDone event. You can use CallSubDelayed to call TakePicture.

@padvoud why do you need to call CloseNow?

I tried it as a workaround for the app freezing.
If you would please take a look at the log I attached, this is my main issue for resolving.

Erel · May 2, 2013

Not sure that I correctly understand the logs. Please start a new thread and describe when are you using CloseNow.

ivanomonti · May 9, 2013

How do I add custom filters as well as frames in this class!!

In addition, it is possible to enter GPS data

Thank

Erel · May 9, 2013

This class doesn't support filters.

You can add GPS data with the EXIF library.

ivanomonti · May 9, 2013

Erel said:
This class doesn't support filters.

You can add GPS data with the EXIF library.

Pardon EREL ... post link library EXIF :-( I do not find

Erel · May 11, 2013

See first search result: Basic4android Search: exif library

yuhong · May 14, 2013

Erel said:
I will add a method to CameraEx to load Jpeg images with the correct orientation.

:signOops:
This method implements it?

Erel · May 14, 2013

Have you tried the code posted by Eduard: http://www.b4x.com/forum/additional...amera-library-functionality-8.html#post151355

birnesoft · May 27, 2013

how can I setPreviewSize( width, height) from camera

I've listed the possible sizes with this code

Dim pl As List
r.target = parameters
pl=r.RunMethod("getSupportedPreviewSizes")

For m = 0 To pl.Size-1
r.target = pl.Get(m)
Dim width = r.GetField("width"), height = r.GetField("height") As Int
Log (width&"-"&height)
Next

pl is:

(ArrayList) [android.hardware.Camera$Size@57dac0, android.hardware.Camera$Size@9fbc30, android.hardware.Camera$Size@afb580, android.hardware.Camera$Size@13f7860, android.hardware.Camera$Size@1676730, android.hardware.Camera$Size@1a74bb0, android.hardware.Camera$Size@27eefd0]

that means:

176-144
320-240
352-288
640-480
720-480
848-480
1280-720

and now I want to set the best size

Java: public void setPreviewSize (int width, int height)

setPreviewSize (1280,720 )

How can I do this??:sign0163:

thank Björn

Erel · May 28, 2013

See how GetSupportedPicturesSizes and SetPictureSize subs are implemented. It should be almost identical.

birnesoft · May 29, 2013

thanks Erel
every function is a big present for me

I :sign0100: B4A

Björn

birnesoft · May 29, 2013

when I change the previewSize the function PreviewImageToJpeg

don't work anymore (program crash and bad picture) ???

r.target = parameters
r.RunMethod3("setPreviewSize", 1280, "java.lang.int", 720, "java.lang.int")

and

Sub Camera1_Preview (PreviewPic() As Byte)
Dim jpeg() As Byte = PreviewImageToJpeg(PreviewPic, 80)

Erel · May 30, 2013

Can you post the error from the logs?

birnesoft · May 30, 2013

adb Logcat program crash after calling PreviewImageToJpeg(PreviewPic, 80)

05-30 22:27:29.475 23878 23878 D skia : onFlyCompress
05-30 22:27:29.538 23878 23884 D dalvikvm: GC_FOR_MALLOC freed 920K, 53% free 31
66K/6663K, external 4559K/5684K, paused 18ms
05-30 22:27:29.897 23915 23915 I DEBUG : *** *** *** *** *** *** *** *** *** *
** *** *** *** *** *** ***
05-30 22:27:29.897 23915 23915 I DEBUG : Build fingerprint: 'motorola/DACH/umt
s_milestone2:2.3.4/MILS2_U6_4.1-22/1317096749:user/release-keys'
05-30 22:27:29.897 23915 23915 I DEBUG : pid: 23878, tid: 23878 >>> br.speedc
am <<<
05-30 22:27:29.897 23915 23915 I DEBUG : signal 11 (SIGSEGV), code 2 (SEGV_ACC
ERR), fault addr 406beb31
05-30 22:27:29.897 23915 23915 I DEBUG : r0 002c83f0 r1 406beb30 r2 002ef19
8 r3 002f05a0
.....

f400f4
05-30 22:27:29.913 23915 23915 I DEBUG : d30 0000000000000000 d31 3ff0000000
000000
05-30 22:27:29.913 23915 23915 I DEBUG : scr 60000012
05-30 22:27:29.913 23915 23915 I DEBUG :
05-30 22:27:29.960 23915 23915 I DEBUG : #00 pc 0005b254 /system/li
b/libandroid_runtime.so
05-30 22:27:29.960 23915 23915 I DEBUG : #01 pc 0005b528 /system/li
b/libandroid_runtime.so
05-30 22:27:29.960 23915 23915 I DEBUG : #02 pc 0005b67a /system/li
b/libandroid_runtime.so
05-30 22:27:29.960 23915 23915 I DEBUG : #03 pc 0005b754 /system/li
b/libandroid_runtime.so
05-30 22:27:29.967 23915 23915 I DEBUG : #04 pc 00011e74 /system/li
b/libdvm.so
05-30 22:27:29.967 23915 23915 I DEBUG :
05-30 22:27:29.967 23915 23915 I DEBUG : code around pc:
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b234 ea4f2400 46260b65 eb066885 e
b02080b
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b244 686f0904 fb072500 eb031708 e
0080804
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b254 ac01f817 a005f809 ac02f817 a
005f808
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b264 37023501 dbf34565 44643601 d
1e32e08
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b274 8ff0e8bd 23026c48 6c4a6083 3
b0160d3
05-30 22:27:29.967 23915 23915 I DEBUG :
05-30 22:27:29.967 23915 23915 I DEBUG : code around lr:
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b50c f7c84628 4605ee22 9003a825 9
300e029
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b51c 46384632 462b4651 9004f8cd f
e7ef7ff
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b52c 68b82200 30e0f8d4 18d36801 f
b019802
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b53c f84b0303 07d33022 1053d40c 0
ea0f10d
05-30 22:27:29.967 23915 23915 I DEBUG : ad35b54c f103fb08 0c83eb0e 18691870 0
c2cf84c
05-30 22:27:29.967 23915 23915 I DEBUG :
05-30 22:27:29.967 23915 23915 I DEBUG : stack:
05-30 22:27:29.967 23915 23915 I DEBUG : bed0e49c 10101010
05-30 22:27:29.967 23915 23915 I DEBUG : bed0e4a0 10101010
0
05-30 22:27:29.967 23915 23915 I DEBUG : bed0e4f8 bed0e514
05-30 22:27:29.967 23915 23915 I DEBUG : bed0e4fc ad35b52d /system/lib/l
ibandroid_runtime.so
05-30 22:27:29.975 23915 23915 I DEBUG : #01 bed0e500 00000000
0
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e51c afd1369d /system/lib/l
ibc.so
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e520 00000064
0
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e530 9d72e900 /system/lib/l
ibjpeg.so
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e534 bed0eb88

05-30 22:27:29.975 23915 23915 I DEBUG : bed0e54c 9d704d84 /system/lib/l
ibjpeg.so
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e550 00000000

05-30 22:27:29.975 23915 23915 I DEBUG : bed0e57c 9d7064c0 /system/lib/l
ibjpeg.so
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e580 00000000

05-30 22:27:29.975 23915 23915 I DEBUG : bed0e5a4 bed0eb88
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e5a8 ad35b4b9 /system/lib/l
ibandroid_runtime.so
05-30 22:27:29.975 23915 23915 I DEBUG : bed0e5ac 405ddb30

05-30 22:27:29.983 23915 23915 I DEBUG : bed0e5c0 404f0ca0
05-30 22:27:29.983 23915 23915 I DEBUG : bed0e5c4 ad35b67d /system/lib/l
ibandroid_runtime.so
05-30 22:27:30.303 6305 6325 I BootReceiver: Copying /data/tombstones/tombston
e_04 to DropBox (SYSTEM_TOMBSTONE)
05-30 22:27:30.335 6294 6294 D CameraHal: stopPreview
05-30 22:27:30.335 6294 6294 I HPAndroidHAL: APILOG: S1Up
05-30 22:27:30.335 6294 6294 D CameraHal: stop preview thread
05-30 22:27:30.335 6305 6337 E InputDispatcher: channel '40b1b810 br.speedcam/
br.speedcam.main (server)' ~ Consumer closed input channel or an error occurred.
events=0x8
05-30 22:27:30.335 6305 6337 E InputDispatcher: channel '40b1b810 br.speedcam/
br.speedcam.main (server)' ~ Channel is unrecoverably broken and will be dispose
d!
05-30 22:27:30.335 6296 6296 D Zygote : Process 23878 terminated by signal (1
1)
05-30 22:27:30.350 6294 6294 I HPAndroidHAL: APILOG: Disable Preview
05-30 22:27:30.350 6294 6294 D CameraHal: CameraHal release
05-30 22:27:30.358 6294 6294 D CameraHal: deinitPvOverlay()
05-30 22:27:30.358 6294 6294 I HPAndroidHAL: APILOG: DeinitializePreviewMemory

05-30 22:27:30.436 6305 6325 D dalvikvm: GC_FOR_MALLOC freed 170K, 31% free 98
66K/14279K, external 3998K/5599K, paused 130ms
05-30 22:27:30.436 6305 6325 I dalvikvm-heap: Grow heap (frag case) to 15.849M
B for 65056-byte allocation
05-30 22:27:30.491 6294 23911 I HPAndroidHAL: Exiting thread OMAPHAL_Thread (ID
: 0x5aaa8)
05-30 22:27:30.491 6294 6294 I HPAndroidHAL: APILOG: ExitHPLibraries
05-30 22:27:30.491 6305 6458 D TIOverlay: overlay_destroyOverlay:IN dev (0x29d
af0) and overlay (0x3b8d00)
05-30 22:27:30.491 6305 6458 I TIOverlay: Destroying overlay/fd=211/obj=003b8d
00
05-30 22:27:30.491 6305 6458 D TIOverlay: overlay_destroyOverlay:OUT
05-30 22:27:30.491 6294 23898 I HPAndroidHAL: Exiting thread CaptureDirectorThr
ead (ID: 0x1750b0)
05-30 22:27:30.491 6294 6294 I HPAndroidHAL: APILOG: state machine shutting do
wn...
05-30 22:27:30.491 6294 23887 I HPAndroidHAL: Exiting thread HALThread (ID: 0xb
8c20)
05-30 22:27:30.491 6294 23888 I HPAndroidHAL: Exiting thread AutoExposureThread
(ID: 0xb6f88)
05-30 22:27:30.491 6294 23889 I HPAndroidHAL: Exiting thread RenderingAnalysisM
odule (ID: 0x158f28)
05-30 22:27:30.491 6294 23890 I HPAndroidHAL: Exiting thread BoxcarThread (ID:
0x158f68)
05-30 22:27:30.491 6294 23891 I HPAndroidHAL: Exiting thread S2ProcessingThread
(ID: 0x137cc8)
05-30 22:27:30.499 6294 23892 I HPAndroidHAL: Exiting thread LensThread (ID: 0x
137d08)
05-30 22:27:30.499 6294 23893 I HPAndroidHAL: Exiting thread FocusThread (ID: 0
xcbb90)
05-30 22:27:30.499 6294 23894 I HPAndroidHAL: Exiting thread paxelMotionThread
(ID: 0xcbbe8)
05-30 22:27:30.499 6294 23895 I HPAndroidHAL: Exiting thread CallbackThread (ID
: 0xcf650)
05-30 22:27:30.499 6294 23896 I HPAndroidHAL: Exiting thread FlickerThread (ID:
0xcf690)
05-30 22:27:30.499 6294 23897 I HPAndroidHAL: Exiting thread FaceDetectThread (
ID: 0x14c9b8)
05-30 22:27:30.499 6294 23899 I HPAndroidHAL: Exiting thread S2PostProcessingTh
read (ID: 0x1750f0)
05-30 22:27:30.499 6294 6294 I HPAndroidHAL: APILOG: components shutting down.
..
05-30 22:27:30.499 6294 6294 I HPAndroidHAL: APILOG: all components uninitiali
zed.

05-30 22:27:30.499 6294 6294 I HPAndroidHAL: APILOG: Destroying Component 0.
05-30 22:27:30.538 6294 6294 I HPAndroidHAL: APILOG: all components destroyed.

05-30 22:27:30.538 6294 6294 I HPAndroidHAL: APILOG: library shutdown complete
.
05-30 22:27:30.569 6305 7189 D dalvikvm: GC_FOR_MALLOC freed <1K, 31% free 992
9K/14343K, external 3998K/5599K, paused 121ms
05-30 22:27:30.569 6305 6471 I WindowManager: WIN DEATH: Window{40b1b810 br.sp
eedcam/br.speedcam.main paused=false}
05-30 22:27:30.624 6294 6294 D CameraHal: CameraHal destructor
05-30 22:27:30.624 6294 6294 D CameraHal: CameraHal release
05-30 22:27:30.624 6294 6294 D CameraSettings: CameraSettings destructor
05-30 22:27:30.686 6305 6325 D dalvikvm: GC_FOR_MALLOC freed 178K, 33% free 97
51K/14343K, external 3998K/5599K, paused 94ms
05-30 22:27:30.686 6305 7189 I ActivityManager: Process br.speedcam (pid 23878
) has died.
05-30 22:27:30.686 6305 6468 I WindowManager: WIN DEATH: Window{40bfa7a8 Surfa
ceView paused=false}
05-30 22:27:30.694 6305 6461 I WindowManager: Setting rotation to 0, animFlags
=1
05-30 22:27:30.741 6305 7189 I ActivityManager: Config changed: { scale=1.0 im
si=262/1 loc=de_DE touch=3 keys=2/1/2 nav=2/1 orien=1 layout=34 uiMode=17 seq=14
6}
05-30 22:27:30.944 6305 6472 W InputManagerService: Got RemoteException sendin
g setActive(false) notification to pid 23878 uid 10143
05-30 22:27:31.233 23822 23822 W WidgetAidService: BroadcastReceiver onReceive c
alled
05-30 22:27:31.241 23822 23822 D WidgetAidService: ACTION_HOME_SCREEN_CHANGED -
2
05-30 22:27:32.257 6387 6387 D RadioSignalLevel: Gsm Radio Signal level: 4
05-30 22:27:32.960 6305 6335 D dalvikvm: GC_EXPLICIT freed 331K, 33% free 9621
K/14343K, external 3998K/5599K, paused 135ms
^C

so much crazy stuff ... I don't understand. :sign0013:

Björn

Erel · May 31, 2013

Make sure to call SetPreviewSize before you start the preview:

B4X:

camEx.SetPreviewSize(320, 240)
camEx.CommitParameters
camEx.StartPreview

It works fine here.

birnesoft · Jun 1, 2013

find no limits in B4A

Juhu,:sign0060:...Erel you are unbelievable, it works.

I've not make commitParameters

U are the best. Another La Ola wave 4U :wav:

Thanks 1000 times

I find no limits in B4A

yckhor · Jun 25, 2013

Hi Erel,
I am attaching 2 screen capture of my app. The camera ex works beautifully but the only issue I am facing is that the captured image seems off proportion in landscape and portrait mode (activity with no title bar & full screen).

I had tested this on the sample camera app provided with this library and produced similar results. This, however, does not happen in the android stock standard camera app.

FYI, I am using a HTC Desire HD rooted and running Android 4.2.2.

Any help would be appreciated. Thanks!

Erel · Jun 26, 2013

Have you tried to change the picture size?

yckhor · Jun 26, 2013

Hi Erel,
The picture size is not an issue, yes, I tried. I had attached the 2 pictures took in landscape & portrait orientation and both looks proportionally correct (notice the little girl figure with a hula loop). It is the preview in panel before a photo is being snapped that looks out of proportion. If you look at the snapshots in my earlier post, you can see the 2 screen snapshot (with a round shutter button) that did not look right in portrait mode, everything looks longish.. am I missing something? Title bar is hidden and it is in Full Screen.:sign0085:

EDIT: Now I realize why you asked me to check SetPictureSize. It's my mistake not illustrating clearly. It's the preview image that's out of proportion not the captured image.

B4A Library [Class] CameraEx - Extends the camera library functionality

Attachments

B4X founder

Active Member

B4X founder

Expert

B4X founder

Expert

B4X founder

Member

B4X founder

Active Member

B4X founder

Active Member

Active Member

B4X founder

Active Member

B4X founder

Active Member

Member

Attachments

B4X founder

Member

Attachments

Similar Threads

Privacy & Transparency

Privacy & Transparency