Is it possible to use OpenCV functions in a Kivy android app?

[Kivy user]

I am creating a QR code reader app for Android using Kivy.

Is it possible to use the "OpenCV functions below" in a Kivy Android app built with Buildozer?

cv2.VideoCapture()
cv2. QRCodeDetector()

The former cv2.VideoCapture() works fine on Mac, but I haven't been able to get it to work on Android yet.

If I change cv2.VideoCapture() to kivy.uix.camera's Camera, the camera works, but accuracy of cv2.QRCodeDetector() gets worse.

I would appreciate it if anyone could give me some advice.

[Robert]

> Is it possible to use the "OpenCV functions below" in a Kivy Android app built with Buildozer?

> cv2.VideoCapture()

probably not
> cv2. QRCodeDetector()

never tried it

https://github.com/Android-for-Python/c4k_qr_example
https://github.com/Android-for-Python/c4k_opencv_example

[Kivy user]

Thank you Robert!

I have newly installed the ZXing library for scanning QR codes.
It works fine on Mac as well, but when I run it on Android I got the errors below.

   PermissionError: [Errno 13] Permission denied: 'java'

   zxing.BarCodeReaderException: ('Could not execute specified Java binary', 'java')

Would it be possible to allow the use of Java in the buildozer.spec?

Or if I want to create a QR code scanner for Android with Kivy, is kivy-garden.zbarcam better?

2023年6月19日月曜日 2:01:45 UTC+9 Robert:

[Robert]

https://github.com/Android-for-Python/Android-for-Python-Users#basic-pyjnius-usage