Android生成彩色的二维码

    import java.awt.Color;  
    import java.awt.Graphics2D;  
    import java.awt.Image;  
    import java.awt.geom.AffineTransform;  
    import java.awt.image.AffineTransformOp;  
    import java.awt.image.BufferedImage;  
    import java.io.File;  
    import java.io.IOException;  
    import java.io.UnsupportedEncodingException;  
    import java.util.Hashtable;  
    import javax.imageio.ImageIO;  
    import com.google.zxing.BarcodeFormat;  
    import com.google.zxing.EncodeHintType;  
    import com.google.zxing.MultiFormatWriter;  
    import com.google.zxing.WriterException;  
    import com.google.zxing.common.BitMatrix;  
      
      
    /**  
     * @author tangb  
     *   
     */  
    public class QRCode {  
        // 图片宽度的一半  
        private static final int IMAGE_WIDTH = 100;  
        private static final int IMAGE_HEIGHT = 100;  
        private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;  
        private static final int FRAME_WIDTH = 2;  
        // 二维码写码器  
        private static MultiFormatWriter mutiWriter = new MultiFormatWriter();  
      
        public static void encode(String content,int width,int height,String srcImagePath,String destImagePath) {  
            try {  
                //生成图片文件  
                ImageIO.write(genBarcode(content,width,height,srcImagePath),"jpg",new File(destImagePath));  
            } catch (IOException e) {  
                e.printStackTrace();  
            } catch (WriterException e) {  
                e.printStackTrace();  
            }  
        }  
      
        private static BufferedImage genBarcode(String content,String srcImagePath) throws WriterException,IOException {  
            // 读取源图像  
            BufferedImage scaleImage = scale(srcImagePath,IMAGE_WIDTH,IMAGE_HEIGHT,true);  
            int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];  
            for (int i = 0; i < scaleImage.getWidth(); i++) {  
                for (int j = 0; j < scaleImage.getHeight(); j++) {  
                    srcPixels[i][j] = scaleImage.getRGB(i,j);//图片的像素点  
                }  
            }  
           //编码  
            Hashtable<EncodeHintType,String> hints = new Hashtable<EncodeHintType,String>();  
            hints.put(EncodeHintType.CHARACTER_SET,"utf-8");  
            // 生成二维码  
            BitMatrix matrix = mutiWriter.encode(content,BarcodeFormat.QR_CODE,hints);  
      
            // 二维矩阵转为一维像素数组  
            int halfW = matrix.getWidth() / 2;  
            int halfH = matrix.getHeight() / 2;  
            int[] pixels = new int[width * height];  
      
            for (int y = 0; y < matrix.getHeight(); y++) {  
                for (int x = 0; x < matrix.getWidth(); x++) {  
                    // 左上角颜色,根据自己需要调整颜色范围和颜色  
                    if (x > 0 && x < 170 && y > 0 && y < 170) {  
                        Color color = new Color(231,144,56);  
                        int colorInt = color.getRGB();  
                        pixels[y * width + x] = matrix.get(x,y) ? colorInt  
                                : 16777215;  
                    }  
                    // 读取图片  
                    else if (x > halfW - IMAGE_HALF_WIDTH  
                            && x < halfW + IMAGE_HALF_WIDTH  
                            && y > halfH - IMAGE_HALF_WIDTH  
                            && y < halfH + IMAGE_HALF_WIDTH) {  
                        pixels[y * width + x] = srcPixels[x - halfW  
                                + IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];  
                    }  
                    // 在图片四周形成边框  
                    else if ((x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH  
                            && x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH  
                            && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH  
                            + IMAGE_HALF_WIDTH + FRAME_WIDTH)  
                            || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH  
                                    && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH  
                                    && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH  
                                    + IMAGE_HALF_WIDTH + FRAME_WIDTH)  
                            || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH  
                                    && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH  
                                    && y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH  
                                    - IMAGE_HALF_WIDTH + FRAME_WIDTH)  
                            || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH  
                                    && x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH  
                                    && y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH  
                                    + IMAGE_HALF_WIDTH + FRAME_WIDTH)) {  
                        pixels[y * width + x] = 0xfffffff;  
                    } else {  
                        // 二维码颜色（RGB）  
                        int num1 = (int) (50 - (50.0 - 13.0) / matrix.getHeight()  
                                * (y + 1));  
                        int num2 = (int) (165 - (165.0 - 72.0) / matrix.getHeight()  
                                * (y + 1));  
                        int num3 = (int) (162 - (162.0 - 107.0)  
                                / matrix.getHeight() * (y + 1));  
                        Color color = new Color(num1,num2,num3);  
                        int colorInt = color.getRGB();  
                        // 此处可以修改二维码的颜色，可以分别制定二维码和背景的颜色；  
                        pixels[y * width + x] = matrix.get(x,y) ? colorInt  
                                : 16777215;// 0x000000:0xffffff  
                    }  
                }  
            }  
      
            BufferedImage image = new BufferedImage(width,BufferedImage.TYPE_INT_RGB);  
            image.getRaster().setDataElements(0,pixels);  
      
            return image;  
        }  
      
        /**  
         * 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标  
         *   
         * @param srcImageFile  
         *            源文件地址  
         * @param height  
         *            目标高度  
         * @param width  
         *            目标宽度  
         * @param hasFiller  
         *            比例不对时是否需要补白：true为补白; false为不补白;  
         * @throws IOException  
         */  
        private static BufferedImage scale(String srcImageFile,boolean hasFiller) throws IOException {  
            double ratio = 0.0; // 缩放比例  
            File file = new File(srcImageFile);  
            BufferedImage srcImage = ImageIO.read(file);  
            Image destImage = srcImage.getScaledInstance(width,BufferedImage.SCALE_SMOOTH);  
            // 计算比例  
            if ((srcImage.getHeight() > height) || (srcImage.getWidth() > width)) {  
                if (srcImage.getHeight() > srcImage.getWidth()) {  
                    ratio = (new Integer(height)).doubleValue()  
                            / srcImage.getHeight();  
                } else {  
                    ratio = (new Integer(width)).doubleValue()  
                            / srcImage.getWidth();  
                }  
                AffineTransformOp op = new AffineTransformOp(  
                        AffineTransform.getScaleInstance(ratio,ratio),null);  
                destImage = op.filter(srcImage,null);  
            }  
            if (hasFiller) {// 补白  
                BufferedImage image = new BufferedImage(width,BufferedImage.TYPE_INT_RGB);  
                Graphics2D graphic = image.createGraphics();  
                graphic.setColor(Color.white);  
                graphic.fillRect(0,height);  
                if (width == destImage.getWidth(null))  
                    graphic.drawImage(destImage,(height - destImage.getHeight(null)) / 2,destImage.getWidth(null),destImage.getHeight(null),Color.white,null);//画图片  
                else  
                    graphic.drawImage(destImage,(width - destImage.getWidth(null)) / 2,null);  
                graphic.dispose();  
                destImage = image;  
            }  
            return (BufferedImage) destImage;  
        }  
      
        public static void main(String[] args) throws UnsupportedEncodingException {  
            // 依次为内容(不支持中文),宽,长,logo图标路径,储存路径  
            QRCode.encode("http://www.baidu.com/",512,"D:logo.jpg","D:2013-01.jpg");  
        }  
    }