Use APKPure App
Get Camera Locker (widget) old version APK for Android
Blocking access to the camera while enabled
Camera Locker Widget blocking access to the camera while enabled, so nobody can't spy you throught the camera.
Just place it on home screen.
When icon is red, widget is disabled and other apps have access to camera.
When icon is blue, widget is enabled and other apps have no acces to camera.
To switch the state just click on widget.