Problem in QR Code Recognition in Portrait Mode

[Mustafa Aldemir]

Hi,

I followed the steps in this answer (http://stackoverflow.com/a/16252917/493080) for using zxing in portrait.

Step 1: Add following lines to rotate data before buildLuminanceSource(..) in decode(byte[] data, int width, int height)
Step 2: Modify getFramingRectInPreview().
Step 3: Disable the check for Landscape Mode in initFromCameraParameters(...)
Step 4: Add following line to rotate camera insetDesiredCameraParameters(...)
Step 5: Do not forget to set orientation of activity to portrait. I.e: manifest

It works well on some small devices. But on some devices (like Samsung Galaxy Note 3, Samsung Galaxy S4, Sony Xperia Z) the non-shaded area is more like a square (instead of rectangle).

And on these devices it can not recognize the QR codes if the QR code covers most of the non-shaded area. If you move the camera farther away (till the QR code covers only the half of the non-shaded area) it recognizes the code.

Also, the yellow result points displayed during decoding are wrong placed on all devices.

Can you give me any recommendations?

best wishes...