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Android生成彩色的二维码

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现在开发中的二维码是越来越多,但是也催生了一些多元化的需求,比如要做个彩色的二维码,下面是一段java代码产生的二维码图片:

第一步就是去网上下载core.jar或者zxing.jar

准备你要的logo图片接下来当然就是 代码的编写了

    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, int width,  
                int height, 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,  
                    width, height, 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 &amp;&amp; x < 170 &amp;&amp; y > 0 &amp;&amp; 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  
                            &amp;&amp; x < halfW + IMAGE_HALF_WIDTH  
                            &amp;&amp; y > halfH - IMAGE_HALF_WIDTH  
                            &amp;&amp; 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  
                            &amp;&amp; x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH  
                            &amp;&amp; y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH &amp;&amp; y < halfH  
                            + IMAGE_HALF_WIDTH + FRAME_WIDTH)  
                            || (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH  
                                    &amp;&amp; x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH  
                                    &amp;&amp; y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH &amp;&amp; y < halfH  
                                    + IMAGE_HALF_WIDTH + FRAME_WIDTH)  
                            || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH  
                                    &amp;&amp; x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH  
                                    &amp;&amp; y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH &amp;&amp; y < halfH  
                                    - IMAGE_HALF_WIDTH + FRAME_WIDTH)  
                            || (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH  
                                    &amp;&amp; x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH  
                                    &amp;&amp; y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH &amp;&amp; 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, height,  
                    BufferedImage.TYPE_INT_RGB);  
            image.getRaster().setDataElements(0, 0, width, height, 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, int height,  
                int width, 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, height,  
                    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, height,  
                        BufferedImage.TYPE_INT_RGB);  
                Graphics2D graphic = image.createGraphics();  
                graphic.setColor(Color.white);  
                graphic.fillRect(0, 0, width, height);  
                if (width == destImage.getWidth(null))  
                    graphic.drawImage(destImage, 0,  
                            (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, 0,  
                            destImage.getWidth(null), destImage.getHeight(null),  
                            Color.white, 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, 512, "D:\\logo.jpg",  
                    "D:\\2013-01.jpg");  
        }  
    }  

标签:java

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