Tracking Camera Access and User Interactions

//Access Camera:
   
view.findViewById<Button>(R.id.button).setOnClickListener {
            Navigation.findNavController(requireActivity(), R.id.fragment_container).navigate(
                  MainFragmentDirections.actionMainFragmentToPermissionsFragment()
            )
   
            //Tracking event is sent
            Webtrekk.getInstance().trackCustomEvent("access camera")
        }
   
//Take/Save image:
   
/** Define callback that will be triggered after a photo has been taken and saved to disk */
    private val imageSavedListener = object : ImageCapture.OnImageSavedCallback {
        override fun onError(imageCaptureError: Int, message: String, cause: Throwable?) {
            Log.e(TAG, "Photo capture failed: $message", cause)
        }
   
        override fun onImageSaved(photoFile: File) {
            Log.d(TAG, "Photo capture succeeded: ${photoFile.absolutePath}")
   
            // We can only change the foreground Drawable using API level 23+ API
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
   
                // Update the gallery thumbnail with latest picture taken
                setGalleryThumbnail(photoFile)
            }
   
            // Implicit broadcasts will be ignored for devices running API
            // level >= 24, so if you only target 24+ you can remove this statement
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
                requireActivity().sendBroadcast(
                    Intent(android.hardware.Camera.ACTION_NEW_PICTURE, Uri.fromFile(photoFile))
                )
            }
   
            // If the folder selected is an external media directory, this is unnecessary
            // but otherwise other apps will not be able to access our images unless we
            // scan them using [MediaScannerConnection]
            val mimeType = MimeTypeMap.getSingleton()
                    .getMimeTypeFromExtension(photoFile.extension)
            MediaScannerConnection.scanFile(
                    context, arrayOf(photoFile.absolutePath), arrayOf(mimeType), null)
   
            //If there is no error, tracking event for taking/saving image is sent
            val params: LinkedHashMap<String, String> = LinkedHashMap()
            params.put("ck6", "take picture")
            Webtrekk.getInstance().trackCustomEvent("click.camera.button", params)
        }
   
    }
   
//Change flash settings:
   
/** Global variable to keep state of flash mode, default value set to off */
   
    private var flashMode = ImageCapture.FLASH_MODE_OFF
   
/** Listener for button used to change flash mode */
        controls.findViewById<ImageButton>(R.id.flash_mode_button).setOnClickListener {
            val flashResource: Int
            flashMode = if (flashMode == ImageCapture.FLASH_MODE_OFF){
                flashResource = R.drawable.ic_flash_auto_white_24dp;
                ImageCapture.FLASH_MODE_AUTO
            }
            else if (flashMode == ImageCapture.FLASH_MODE_AUTO){
                flashResource = R.drawable.ic_flash_on_white_24dp;
                ImageCapture.FLASH_MODE_ON
            }
            else {
                flashResource = R.drawable.ic_flash_off_white_24dp;
                ImageCapture.FLASH_MODE_OFF
            }
            val flashButtonImage = container.findViewById<ImageButton>(R.id.flash_mode_button)
   
            // Run the operations in the view's thread
            flashButtonImage.post {
   
                // Load thumbnail into circular button using Glide
                Glide.with(flashButtonImage)
                    .load(flashResource)
                    .apply(RequestOptions.circleCropTransform())
                    .into(flashButtonImage)
            }
   
            //Bind use cases
            bindCameraUseCases()
   
            //Tracking event is sent
            val params: LinkedHashMap<String, String> = LinkedHashMap()
            params.put("ck6", "change flash setting")
            Webtrekk.getInstance().trackCustomEvent("click.camera.button", params)
        }
   
//Change lens facing to front or back:
   
/** Global variable to keep state of chosen camera, default values set to back camera */
   
    private var lensFacing = CameraSelector.LENS_FACING_BACK
   
/** Listener for button used to switch cameras */
        controls.findViewById<ImageButton>(R.id.camera_switch_button).setOnClickListener {
            lensFacing = if (CameraSelector.LENS_FACING_FRONT == lensFacing) {
                CameraSelector.LENS_FACING_BACK
            } else {
                CameraSelector.LENS_FACING_FRONT
            }
   
            //Bind use cases
            bindCameraUseCases()
   
            //Tracking event is sent
            val params: LinkedHashMap<String, String> = LinkedHashMap()
            params.put("ck6", "change camera")
            Webtrekk.getInstance().trackCustomEvent("click.camera.button", params)
        }

//Access Camera:
   
        view.findViewById(R.id.button).setOnClickListener(v -> {
            Navigation.findNavController(requireActivity(), R.id.fragment_container).navigate(
                MainFragmentDirections.actionMainFragmentToPermissionsFragment());
   
                //Tracking event is sent
                Webtrekk.getInstance().trackCustomEvent("access camera", Collections.emptyMap());
   
        });
   
//Take/Save image:
   
/** Define callback that will be triggered after a photo has been taken and saved to disk */
   
    private ImageCapture.OnImageSavedCallback imageSavedListener = new ImageCapture.OnImageSavedCallback() {
        @Override
        public void onError(int imageCaptureError, @NonNull String message, @Nullable Throwable cause) {
            Log.e(TAG, "Photo capture failed: " + message, cause);
        }
        @Override
        public void onImageSaved(@NonNull File file) {
            String msg = "Pic captured at " + file.getAbsolutePath();
            Log.d(TAG, "Photo capture succeeded: " + msg);
   
            // We can only change the foreground Drawable using API level 23+ API
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
   
                // Update the gallery thumbnail with latest picture taken
                setGalleryThumbnail(true);
            }
   
            //If there is no error, tracking event for taking/saving image is sent
            Map<String, String> params = new LinkedHashMap<>();
            params.put("ck6", "take picture");
            Webtrekk.getInstance().trackCustomEvent("click.camera.button", params);
        }
    };
   
//Change flash settings:
   
/** Global variable to keep state of flash mode, default value set to off */
   
    private int flashMode = FlashMode.OFF;
   
/** Listener for button used to change flash mode */
        view.findViewById(R.id.flash).setOnClickListener(v -> {
            if (flashMode == FlashMode.ON) {
                flashMode = FlashMode.OFF;
                flashResource = R.drawable.ic_flash_off_white_24dp;
            } else if (flashMode == FlashMode.OFF) {
                flashMode = FlashMode.AUTO;
                flashResource = R.drawable.ic_flash_auto_white_24dp;
            } else if (flashMode == FlashMode.AUTO) {
                flashMode = FlashMode.ON;
                flashResource = R.drawable.ic_flash_on_white_24dp;
            }
   
            Glide.with(flashButton)
                    .load(flashResource)
                    .diskCacheStrategy(DiskCacheStrategy.NONE)
                    .skipMemoryCache(true)
                    .apply(RequestOptions.circleCropTransform())
                    .into(flashButton);
            bindPreview(cameraProvider);
   
            //Tracking event is sent
            Map<String, String> params = new LinkedHashMap<>();
            params.put("ck6", "change flash setting");
            Webtrekk.getInstance().trackCustomEvent("click.camera.button", params);
        });
   
//Change lens facing to front or back:
   
/** Global variable to keep state of chosen camera, default values set to back camera */
    private int lensFacing = LensFacing.BACK;
   
/** Listener for button used to switch cameras */
view.findViewById(R.id.camera_switch_button).setOnClickListener(v -> {
            if (lensFacing == LensFacing.BACK)
                lensFacing = LensFacing.FRONT;
            else
                lensFacing = LensFacing.BACK;
            bindPreview(cameraProvider);
   
            //Tracking event is sent
            Map<String, String> params = new LinkedHashMap<>();
            params.put("ck6", "change camera");
            Webtrekk.getInstance().trackCustomEvent("click.camera.button", params);
        });