FIT_IN:
In this mode, the camera preview frames will be scaled to fit inside the layout view size - the full preview frame content will be visible, but unused edges might appear in the preview layout.
FILL_IN:
In this mode, the camera preview frames fill the entire layout view - the preview frames may contain additional content at the edges that are not visible in the preview layout.
Configuration of the camera preview mode.
FIT_IN: In this mode, the camera preview frames will be scaled to fit inside the layout view size - the full preview frame content will be visible, but unused edges might appear in the preview layout.FILL_IN: In this mode, the camera preview frames fill the entire layout view - the preview frames may contain additional content at the edges that are not visible in the preview layout.