Flashlight Camera2 API
Can I use camera preview and flashlight at the same time in Android Camera2 API?
When I try use CameraManager.setTorchMode(String cameraId, boolean enabled) it's work fine when camera is not opened. But when Camera is open and I try setTorchMode I receive this exception:
CameraService: setTorchMode: torch mode of camera 0 is not available because camera is in use
Answer
The error is indicating that the camera in question, is already in use.
You need to set the FLASH_MODE and CONTROL_AE_MODE accordingly.
mPreviewRequestBuilder.set(CaptureRequest.FLASH_MODE, CaptureRequest.FLASH_MODE_OFF);
mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON);
// Then Send request to current camera session
mCaptureSession.setRepeatingRequest(mPreviewRequestBuilder.build(), null, null);