Android：删除反射绘图中的分隔色

我只是想为我的徽标图像做一个镜像。所以我使用了下面的代码。

我只想拆下黑线分隔符。

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请提供给我最好的方法来做到这一点

最后我发现了错误。我认为

final int reflectionap=-4将减小间隙。但是我必须把
final int reflectionGap=0在此之后，分离线被移除

public Bitmap applyReflection(Drawable drawable) {
            Bitmap originalImage = ((BitmapDrawable)drawable).getBitmap();
            final int reflectionGap = -4;
            int width = originalImage.getWidth();
            int height = originalImage.getHeight();          
            Matrix matrix = new Matrix();
            matrix.preScale(1, -1);
            Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, height/2, width, height/2, matrix, false);          
            Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height/2), Config.ARGB_8888);
            Canvas canvas = new Canvas(bitmapWithReflection);
            canvas.drawBitmap(originalImage, 0, 0, null);
            Paint defaultPaint = new Paint();
            canvas.drawRect(0, height, width, height + reflectionGap, defaultPaint);
            canvas.drawBitmap(reflectionImage,0, height + reflectionGap, null);

            Paint paint = new Paint();
            LinearGradient shader = new LinearGradient(0, originalImage.getHeight(), 0,

                    bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);
            //paint.setShader(shader);
            paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
            canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint);

            return bitmapWithReflection;
        }