MultiFormatWriter writer = new MultiFormatWriter();            Dictionary
     
       hint = new Dictionary
      
       ();            hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");            hint.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);            BarcodeWriter barcodeWriter = new BarcodeWriter();            var bm = writer.encode("123123123", BarcodeFormat.QR_CODE, 700, 700, hint);            var bmp = barcodeWriter.Write(bm);            //获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）            int[] rectangle = bm.getEnclosingRectangle();            Bitmap logo = BitmapFactory.DecodeResource(this.Resources, Resource.Mipmap.timg);            //计算插入图片的大小和位置            int width = Math.Min((int)(rectangle[2] / 3.5), logo.Width);            int height = Math.Min((int)(rectangle[3] / 3.5), logo.Height);            int left = (bmp.Width - width) / 2;            int top = (bmp.Height - height) / 2;            int right = left + width;            int bottom = top + height;            //将img转换成bmp格式，否则后面无法创建Graphics对象             using (Android.Graphics.Canvas g = new Canvas(bmp))            {                //先填充个白色背景              //  g.DrawRect(new Rect(left-1, top-1, right+1, bottom+1), new Paint() { Color = Color.White });                g.DrawBitmap(logo, new Rect(0, 0, logo.Width, logo.Height), new Rect(left, top, right, bottom), new Paint());            }             ImageView view = new ImageView(this);            view.SetImageBitmap(bmp);            this.AddContentView(view, new Android.Views.ViewGroup.LayoutParams(700, 700));