Android开发：生成二维码源码详解

/// <summary>  
      /// 生成二维码.  
      /// </summary>  
      /// <param name="data">需要添加进去的文本</param>  
      /// <returns></returns> 
      public System.Drawing.Image GCode(String data)  
      {  
          QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();  
          qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;  
          qrCodeEncoder.QRCodeScale = 5;  
          qrCodeEncoder.QRCodeVersion = 7;  
  
          qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;  
          var pbImg = qrCodeEncoder.Encode(data, System.Text.Encoding.UTF8);  
         var width = pbImg.Width / 10;  
        var dwidth = width * 2;  
          Bitmap bmp = new Bitmap(pbImg.Width + dwidth, pbImg.Height + dwidth);  
          Graphics g = Graphics.FromImage(bmp);  
          var c = System.Drawing.Color.White;  
          g.FillRectangle(new SolidBrush(c), 0, 0, pbImg.Width + dwidth, pbImg.Height + dwidth);  
          g.DrawImage(pbImg, width, width);  
          g.Dispose();  
         return bmp;  
      }  
  
     /// <summary>  
      /// 调用此函数后使此两种图片合并，类似相册，有个  
    /// 背景图，中间贴自己的目标图片  
     /// </summary>  
      /// <param name="sourceImg">粘贴的源图片</param>