Change torch brightness while camera preview is working

Mobile Galaxy Camera
1

In Android 13 (API 33) a new control is appeared to adjust torch brightness:
public void turnOnTorchWithStrengthLevel ( cameraId, int torchStrength)

But invoking this function during a working camera preview raises an Exception:
android.hardware.camera2.CameraAccessException: CAMERA_IN_USE (4): turnOnTorchWithStrengthLevel:2596: Torch for camera “0” is not available due to an existing camera user

The only way to use torch during preview is to adjust capture request builder with option:
builder.set(CaptureRequest.FLASH_MODE, if (isOn) CaptureRequest.FLASH_MODE_TORCH else CaptureRequest.FLASH_MODE_OFF)
But it not allows to modify flashlight brightness.

2

Hello alexei.maiyorov,
Is this issue only occurring in Samsung Galaxy devices? Have you tried to reproduce the issue on any non-Samsung Device like Pixel? If so, can you share your experience?

Thank you,
Ummey Habiba Bristy
Samsung Developer Program Team

3

Hi UmmeyHB.
Actually, I haven’t chance to try it on non-Samsung device. I am not really sure, but I almost believe the result will be the same.

4

Hello alexei.maiyorov,
In which Galaxy devices the issue is reproducing?

Thank you,
Ummey Habiba Bristy
Samsung Developer Program Team

5

Hello UmmeyHB
S20 and S22 Ultra.