How to unbind single use-case in cameraX

Question

I have multiple use cases for lens, preview, focus etc

I know how to unbind it all cameraProvider?.unbindAll()

But, how to unbind only one use case. How to pass only focus to unbind ?

And how It knows, Which one to unbind if I pass cameraProvider?.unbind(imageCapture) because there is no order and they are not assigned to any variable. So, I'm confused !

Each time I unbind all the screen will be reloaded. So, I need to somehow avoid that.

while trying so, I'm also getting this error

No supported surface combination is found for camera device - Id : 0. May be attempting to bind too many use cases.

Answer 1

But, how to unbind only one use case

You can unbind only one use case (or even two use cases) using ProcessCameraProvider.unbind() which takes a variable number of arguments (varargs) of type UseCase.

// Binding Preview and ImageCapture use cases
cameraProvider.bind(lifecycleOwner, cameraSelector, preview, imageCapture)

...

// Unbinding the ImageCapture use case
cameraProvider.unbind(imageCapture)

And how It knows, Which one to unbind if I pass cameraProvider?.unbind(imageCapture) because there is no order and they are not assigned to any variable. So, I'm confused !

CameraX doesn't need to explicitly know that you're unbinding an image capture use case for example. It unbinds a use case, which has a certain configuration, e.g. Surface, resolution, image format, etc. This translates to updating the camera capture session if necessary.

Each time I unbind all the screen will be reloaded. So, I need to somehow avoid that.

The glitch is probably caused by unbinding a repeating capture request, like preview.