CameraX use Preview but this lib use AutoFitSurfaceView.How to switch front back camera?

[Squall-Huang]

preview.setSurfaceProvider(
                previewView.getSurfaceProvider())

Because AutoFitSurfaceView can't get SurfaceProvider, how to switch from back camera to front camera?

[ThibaultBee]

Hi,

As a preview view, user shall provide aSurface (in the startPreview) and not an AutoFitSurfaceView. If you can get a Surface from CameraX PreviewView then you can use this Surface otherwise you will have to use another type of Surface than PreviewView. Is there a reason why you want to keep using AndroidX PreviewView?

To switch from back to front camera, you can do:

• in startPreview set the startup camera with cameraId = "0"
• then use streamer.camera = "0" "0" is the camera id, you can get the full list of camera id with Context.getCameraList() or list of back camera with Context.getBackCameraList() or list of front camera with Context.getFrontCameraList().

[Squall-Huang]

Hi Thibault: Thank you so much to reply my question and solve my problem. After I use startPreview(surface, "1") , camera change to front. streamer.camera = "0" can swich to back camera.