如下就是关键部分代码：如何才能实现圆角ImageView以centerCrop模式显示？

public static Bitmap getBitmap(int width, int height) {
        //int shadow = (int)(UIUtils.dip2px(2));
        Bitmap output = Bitmap.createBitmap(width,
                height, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);
        final int color = 0xff424242;  
        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, width, height);
        final RectF rectF = new RectF(rect);
        paint.setAntiAlias(true);  
        canvas.drawARGB(0, 0, 0, 0);  
        paint.setColor(color); 
        canvas.drawRoundRect(rectF, getRoundPx(), getRoundPx(), paint);

        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
        canvas.drawBitmap(output, rect, rect, paint);
        
        return output;
    }