Scanner does not scan

[FrankFinken]

Hi,

I'm new to android programming and I downloaded the ZXing.Delphi-master zip file. The test application compiled fine and starts on my S4, but the scanner does not read valid barcodes. The ReadResult in GetImage is always nil. I have set the focus mode as suggested in the oncamerclick (CameraComponent1.FocusMode := TFocusMode.ContinuousAutoFocus;)

For the rest the app is as downloaded. What am I missing/doing wrong here? Any help is greatly appreciated.

Delphi version is XE 10.1

Regards, Frank

[Spelt]

Hi

What version of Delphi do you use? Does the camera seems in focus? Is the picture clear?

2016-06-01 0:18 GMT+02:00 FrankFinken notifications@github.com:

Hi,

I'm new to android programming and I downloaded the ZXing.Delphi-master zip file. The test application compiled fine and starts on my S4, but the scanner does not read valid barcodes. The readresult in GetImage is always nil. I have set the focus mode as suggested in the oncamerclick (CameraComponent1.FocusMode := TFocusMode.ContinuousAutoFocus;)

For the rest the app is as downloaded. What am I missing/doing wrong here?

Any help is greatly appreciated.

Regards, Frank

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[FrankFinken]

Hi,

thanks for your reply.

I'm using Delphi XE 10.1 The picture is clear and focussed. The ZXing barcode scanner app can read the barcodes.

[FrankFinken]

Tonight I will try using XE8.

[Spelt]

Did not test it on 10.1 But did test it on 10 (Seattle).

2016-06-01 14:29 GMT+02:00 FrankFinken notifications@github.com:

Tonight I will try using XE8.

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[FrankFinken]

If I build on my XE8 environment it also does not work. When I use intent code I can scan, but then I need the extenal scanner app.

var LIntent: JIntent; begin // set OnActivityResult message handler FMessageSubscriptionID := TMessageManager.DefaultManager.SubscribeToMessage(TMessageResultNotification, HandleActivityMessage);

// launch Barcode Scanner in SCAN mode LIntent := TJIntent.JavaClass.init(StringToJString('com.google.zxing.client.android.SCAN')); LIntent.setPackage(StringToJString('com.google.zxing.client.android')); LIntent.putExtra(StringToJString('SCAN_MODE'), StringToJString('ONE_D_MODE,QR_CODE_MODE,PRODUCT_MODE,DATA_MATRIX_MODE'));

SharedActivity.startActivityForResult(LIntent, SCAN_REQUEST_CODE);

[Spelt]

Hi Frank

There should be no need for this ugly code ;-) I do not have a S4 over here but on my androids it just works.

Could you zip the code and post it? Then I can take a closer look.

Op 3 jun. 2016, om 14:08 heeft FrankFinken notifications@github.com het volgende geschreven:

If I build on my XE8 environment it also does not work. When I use intent code I can scan, but then I need the extenal scanner app.

var LIntent: JIntent; begin // set OnActivityResult message handler FMessageSubscriptionID := TMessageManager.DefaultManager.SubscribeToMessage(TMessageResultNotification, HandleActivityMessage);

// launch Barcode Scanner in SCAN mode LIntent := TJIntent.JavaClass.init(StringToJString('com.google.zxing.client.android.SCAN')); LIntent.setPackage(StringToJString('com.google.zxing.client.android')); LIntent.putExtra(StringToJString('SCAN_MODE'), StringToJString('ONE_D_MODE,QR_CODE_MODE,PRODUCT_MODE,DATA_MATRIX_MODE'));

SharedActivity.startActivityForResult(LIntent, SCAN_REQUEST_CODE);

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[Spelt]

Question: How do the unit tests work?

Hi Frank

There should be no need for this ugly code ;-) I do not have a S4 over here but on my androids it just works.

Could you zip the code and post it? Then I can take a closer look.

Op 3 jun. 2016, om 14:08 heeft FrankFinken <notifications@github.com mailto:notifications@github.com> het volgende geschreven:

If I build on my XE8 environment it also does not work. When I use intent code I can scan, but then I need the extenal scanner app.

var LIntent: JIntent; begin // set OnActivityResult message handler FMessageSubscriptionID := TMessageManager.DefaultManager.SubscribeToMessage(TMessageResultNotification, HandleActivityMessage);

// launch Barcode Scanner in SCAN mode LIntent := TJIntent.JavaClass.init(StringToJString('com.google.zxing.client.android.SCAN')); LIntent.setPackage(StringToJString('com.google.zxing.client.android')); LIntent.putExtra(StringToJString('SCAN_MODE'), StringToJString('ONE_D_MODE,QR_CODE_MODE,PRODUCT_MODE,DATA_MATRIX_MODE'));

SharedActivity.startActivityForResult(LIntent, SCAN_REQUEST_CODE);

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[tcyhaveto]

@FrankFinken Maybe you need change the Camera Quality Model as the following code: CameraComponent1.Quality:=TVideoCaptureQuality.MediumQuality;

[Rafdev86]

Hi I'm using Delphi XE 10 Seattle

when I add : CameraComponent1.FocusMode := TFocusMode.ContinuousAutoFocus; I get the following error : delphi java.lang.runtimeexception: setparameters failed.

Thanx for your help.

[Spelt]

Hi

Sounds not like a ZXing but a TCameraComponent issue. Try the TCameraComponent in a stand alone application or try the demo application first.

2016-06-08 12:08 GMT+02:00 Rafdev86 notifications@github.com:

Hi I'm using Delphi XE 10 Seattle

when I add : CameraComponent1.FocusMode := TFocusMode.ContinuousAutoFocus; I get the following error : delphi java.lang.runtimeexception: setparameters failed.

Thanx for your help.

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[Rafdev86]

Hi Spelt,

I tested the TCameraComponent in a stand alone application with the TFocusMode I got the same error. Is there another solution to enable the TFocusMode?

[Spelt]

To be honest, I never encountered this error before. Which Android hardware do you use?

Few options to try:

1)

There is a bug in the TCameraComponent (XE7/XE8/10) which causes the Android camera not to autofocus at all and therefore crippels the barcode scanning. There is a work around which can be found here: https://translate.google.nl/translate?sl=auto&tl=en&js=y&prev= _t&hl=nl&ie=UTF-8&u= http://tacotony.pixnet.net/blog/post/105520991-xe6%E7%82%BAtcameracomponent%E5%85%83%E4%BB%B6%E5%8A%A0%E4%B8%8A%E5%B0%8D%E7%84%A6%E5%8A%9F%E8%83%BD&edit-text=

2) This project, https://github.com/gmurt/KernowSoftwareFMX is pretty neat also and has maybe aTCameraViewer that you can use. I dont know if this helps though but you can try the demo pretty quickly.

2016-06-08 15:25 GMT+02:00 Rafdev86 notifications@github.com:

Hi Spelt,

I tested the TCameraComponent in a stand alone application with the TFocusMode I got the same error. Is there another solution to enable the TFocusMode?

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[Rafdev86]

Hi Spelt,

I use Android 5.1.1 (API 22). Delphi XE 10 Seattle. I tried the option 1, I had the same problem (I may be wrong tried). Option 2, it doesn't contain TCameraViewer demo.

[Spelt]

He has a component though which is easy to setup.

Your TCameraComponent seems pretty weird: maybe you are suffering from:

There is a bug in the TCameraComponent (XE7/XE8/10) which causes the Android camera not to autofocus at all and therefore crippels the barcode scanning. There is a work around which can be found here: https://translate.google.nl/translate?sl=auto&tl=en&js=y&prev= _t&hl=nl&ie=UTF-8&u= http://tacotony.pixnet.net/blog/post/105520991-xe6%E7%82%BAtcameracomponent%E5%85%83%E4%BB%B6%E5%8A%A0%E4%B8%8A%E5%B0%8D%E7%84%A6%E5%8A%9F%E8%83%BD&edit-text=

2016-06-09 12:03 GMT+02:00 Rafdev86 notifications@github.com:

Hi Spelt,

I use Android 5.1.1 (API 22). Delphi XE 10 Seattle. I tried the option 1, I had the same problem (I may be wrong tried). Option 2, it doesn't contain TCameraViewer demo.

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[maurobotta]

I'm using Berlin on HTC One Max and Samsung S6 and aTestApp demo don't work

ReadResult in GetImage is always nil in ZXing.Delphi V 3.1

i can see image on my app and "***" chars, but scanner don't read simple ean13 bar code

vclTestApp demo don't work for me, always scan result: "Unreadable!"

[Spelt]

Hi Mauro,

Unfortunately ean is not supported at this time. There was some work done but its not completed.

Sincerely, Edward

Op 5 sep. 2016 om 12:32 heeft Mauro Botta notifications@github.com het volgende geschreven:

I'm using Berlin on HTC One Max and Samsung S6 and aTestApp demo don't work

ReadResult in GetImage is always nil in ZXing.Delphi V 3.1

i can see image on my app and "***" chars, but scanner don't read simple ean13 bar code

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