Android - Get touch on specific view by pixel

ActionTouch.java

public class ActionTouch implements View.OnTouchListener {

    private View.OnClickListener onClickListener;

    public ActionTouch(View.OnClickListener onClickListener) {
        this.onClickListener = onClickListener;
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if(event.getAction() == MotionEvent.ACTION_UP){
            // The on touch is implemented on a the viewgroup which holds the views we want to get the touch of
            ViewGroup viewGroup = (ViewGroup)v;
            // Should go from the last child to the first child, the deeper the child is in the UI, the lower index it is
            for (int pos = viewGroup.getChildCount() - 1; pos >= 0 ; pos--) {

                // Child view, which is a relative layout, which holds the view with the image
                View rlView = viewGroup.getChildAt(pos);
                View view = rlView.findViewById(R.id.iv_modify);

                // Will save in rect the position bounds of the rlView
                Rect r = new Rect(0, 0, rlView.getWidth(), rlView.getHeight());

                viewGroup.getChildVisibleRect(rlView, r, new Point(0, 0));

                // Only if the touch was in the bounds of the rlView, it's considerate as touched
                boolean isTouched = event.getRawX() >= r.left && event.getRawX() <= r.right && event.getRawY() >= r.top && event.getRawY() <= r.bottom;

                if(!isTouched) continue;

                // For image views, check whether it touched on a colored pixel or transparent background
                Bitmap bitmap = getBitmapFromDrawable(((ImageView) view).getDrawable(), view.getWidth(), view.getHeight());

                // Calculate the offset of x & y depend on raw touch and rlView rect
                int x = (int) (event.getRawX() - r.left);
                int y = (int) (event.getRawY() - r.top);

                // Didn't touch on a colored pixel of image
                if (bitmap.getPixel(x, y) == Color.TRANSPARENT)
                    continue;

                if (onClickListener != null) {
                        onClickListener.onClick(view);
                        break;
                }
            }
         
        }
        return true;
    }


    /**
     * https://stackoverflow.com/questions/33696488/getting-bitmap-from-vector-drawable
     *
     * @param drawable
     * @return
     */
    public Bitmap getBitmapFromDrawable(Drawable drawable, int newWidth, int newHeight) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            drawable = (DrawableCompat.wrap(drawable)).mutate();
        }

        Bitmap bitmap = Bitmap.createBitmap(newWidth,
                newHeight, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);

        return bitmap;
    }


}

touch.java

GestureDetectorCompat gestureDetectorCompat = new GestureDetectorCompat(this, new GestureDetector.OnGestureListener() {
            @Override
            public boolean onDown(MotionEvent motionEvent) {
                // Get the drawable of the view, and make a copy of it, so the original drawable doesn't get modified
                Drawable imgDrawable = ((ImageView)touchedView).getBackground().getConstantState().newDrawable().mutate();
                // For vectories drawable, create a bitmap with this method
                Bitmap bitmap = getBitmapFromVectorDrawable(imgDrawable, touchedView.getWidth(), touchedView.getHeight());
                // For other type of drawable
                // Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), imgDrawable /* OR R.drawable.icon*/);
              
                int pixel = bitmap.getPixel((int) motionEvent.getX(), (int) motionEvent.getY());

                String colorHex = Integer.toHexString(pixel);

                System.out.println("Touched color in view " + colorHex);

                // When touching on a zone without any color or alpha, it will return 0 in the pixel
                // So to continue to the next view in the same position, shouldn't consume the click on this view
                return !colorHex.equals("0");
            }

 public static Bitmap getBitmapFromVectorDrawable(Drawable drawable, int newWidth, int newHeight) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            drawable = (DrawableCompat.wrap(drawable)).mutate();
        }

        Bitmap bitmap = Bitmap.createBitmap(newWidth,
                newHeight, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);

        return bitmap;
    }