[ANDROID] drawable 파일 bitmap 변환

public static Bitmap drawableToBitmap(Drawable drawable) {
        Bitmap bitmap = null;

        try {
            if (drawable instanceof BitmapDrawable) {
                BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
                if (bitmapDrawable.getBitmap() != null) {
                    return bitmapDrawable.getBitmap();
                }
            }

            if (drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
                bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
            } else {
                bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
            }

            Canvas canvas = new Canvas(bitmap);
            drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
            drawable.draw(canvas);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return bitmap;
    }