Whether auto-focus (AF) is currently enabled, and what mode it is set to.

Only effective if CaptureRequest.ControlMode = AUTO and the lens is not fixed focus (i.e. CameraCharacteristics.LensInfoMinimumFocusDistance > 0).

If the lens is controlled by the camera device auto-focus algorithm, the camera device will report the current AF status in CaptureResult.ControlAfState in result metadata.

Possible values:

• CameraMetadata.CONTROL_AF_MODE_OFF
• CameraMetadata.CONTROL_AF_MODE_AUTO
• CameraMetadata.CONTROL_AF_MODE_MACRO
• CameraMetadata.CONTROL_AF_MODE_CONTINUOUS_VIDEO
• CameraMetadata.CONTROL_AF_MODE_CONTINUOUS_PICTURE
• CameraMetadata.CONTROL_AF_MODE_EDOF

Available values for this device:

CameraCharacteristics.ControlAfAvailableModes

This key is available on all devices.

[Android Documentation]