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public Bitmap scaleBitmapDown(Bitmap bitmap, int maxDimension) {

        int originalWidth = bitmap.getWidth();
        int originalHeight = bitmap.getHeight();
        int resizedWidth = maxDimension;
        int resizedHeight = maxDimension;

        if (originalHeight > originalWidth) {
            resizedHeight = maxDimension;
            resizedWidth = (int) (resizedHeight * (float) originalWidth / (float) originalHeight);
        } else if (originalWidth > originalHeight) {
            resizedWidth = maxDimension;
            resizedHeight = (int) (resizedWidth * (float) originalHeight / (float) originalWidth);
        } else if (originalHeight == originalWidth) {
            resizedHeight = maxDimension;
            resizedWidth = maxDimension;
        }
        return Bitmap.createScaledBitmap(bitmap, resizedWidth, resizedHeight, false);
    }