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android opencv green flash

When I start my activity using JavaCameraView my screen is green for about 1 second and after that the camera in open normally. When I use NativeCameraView the screen is black for 1 second. How can I have a black screen before opening camera(without using NativeCameraView) ?;

android opencv green flash

When I start my activity using JavaCameraView my screen is green for about 1 second and after that the camera in open normally. When I use NativeCameraView the screen is black for 1 second. How can I have a black screen before opening camera(without using NativeCameraView) ?;