问题
I am attempting to use Chaquopy to port a computer vision application to android. When I try to run my script the following error occurs on the following line:
cv2.waitKey(100)
The error which prints to the embedded python console is:
java.chaquopy.CQPEnv.check_exception
com.chaquo.python.PyException: error: OpenCV(3.4.2) /home/smith/git/chaquo/python/server/pypi/packages/opencv-python/build/3.4.2.16/cp36-cp36m-android_15_armeabi_v7a/src/opencv/modules/highgui/src/window.cpp:698: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvWaitKey'
I have installed openCV in the build gradle as follows:
pip {
install "opencv-python"
}
Which is according to the Chaquopy documentation found here: Chaquopy openCV discussion
回答1:
It looks like OpenCV only has support for key events on desktop platforms, not mobile ones. The same is probably true of all the other "High-level GUI" functions.
Anyway, unless your Android device actually has a keyboard, waiting for a keypress doesn't really make sense. You might be better off creating a simple Android UI like in the Chaquopy demo app, and interacting with the user that way.
来源：https://stackoverflow.com/questions/56224122/how-to-use-opencv-wait-key-with-chaquopy