private void savePhoto() {

        if (imageCapture == null) return;

        if (isTakingPhoto.get()) return;

        showProgressBar();
        hidePreviewImage();

        if (cameraState == CameraState.IDLE) {
            try {
                startCamera();
            } catch (Exception e) {e.printStackTrace(); }
        }

        Button captureButton = requireView().findViewById(R.id.camera_capture_button);
        captureButton.setEnabled(false);

        File photoFile = getPhotoFile();
        ImageCapture.OutputFileOptions outputOptions = new ImageCapture.OutputFileOptions.Builder(photoFile)
                .build();

        isTakingPhoto.set(true);

        imageCapture.takePicture(
                outputOptions,
                ContextCompat.getMainExecutor(requireContext()),
                new ImageCapture.OnImageSavedCallback() {
            @Override
            public void onImageSaved(@NonNull ImageCapture.OutputFileResults outputFileResults) {
                Uri savedUri = Uri.fromFile(photoFile);
                Log.d(TAG, "Photo is shot to " + savedUri.toString());

                try {
                    ExifInterface exifInterface  = new ExifInterface(photoFile.getAbsolutePath());
                    ExifData exifData = loadExifData(exifInterface);
                    photoSet.setExifData(exifData);

                    cropAndCompressPhotoFile(photoFile);
                    exifInterface.saveAttributes();

                } catch (IOException e) { e.printStackTrace(); }

                photoSet.setPhotoTaken(true);
                if (photoSet.isBoxPhotoNext()) { shutdownCamera(); }

                photoSet.setFlash(flashButtonChecked);
                isTakingPhoto.set(false);
                captureButton.setEnabled(true);
                UpdateUI();
            }

            @Override
            public void onError(@NonNull ImageCaptureException exception) {
                Log.e(TAG, "Photo capture is failed: " + exception.getLocalizedMessage());
                exception.printStackTrace();

                captureButton.setEnabled(true);
                isTakingPhoto.set(false);
                UpdateUI();
            }
        });
    }