As the title mentioned, try to google by the keywords "OpenCV4 android camera" or "OpenCV4 android camera c++" but cannot find the answers like "yes" or "no", I remember opencv3 do not support this feature.
I found the examples written by java, but I am not sure under the hood, it is using the android api or c++ api(cv::VideoCapture) to capture the frame with JNI binding.
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