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fixed #15
fixed without access in black layout in cameraview
There is no need to explicitly call CameraX.unbindAll() , since the UseCase is bound to a lifecycle and resources will be automatically freed when the lifecycle reaches the destroyed state. Also, Activity has no onDestroyView method, which is instead owned by Fragments. By the way, for Fragments the proper lifecycle to bind the UseCases to would be the viewLifecycleOwner ‘s lifecycle.