Androidは画像付きの二次元コードを生成する。

転載:http://blog.csdn.net/jerehedu/article/details/45746369

/**
     *      
     * @param string            
     * @param mBitmap logo  
     * @param format      
     * @return Bitmap   
     * @throws WriterException
     */
    public Bitmap createCode(String string,Bitmap mBitmap, BarcodeFormat format)
            throws WriterException {
        Matrix m = new Matrix();
        float sx = (float) 2 * IMAGE_HALFWIDTH / mBitmap.getWidth();
        float sy = (float) 2 * IMAGE_HALFWIDTH
                / mBitmap.getHeight();
        m.setScale(sx, sy);//      
        // logo   martix       
        mBitmap = Bitmap.createBitmap(mBitmap, 0, 0,
                mBitmap.getWidth(), mBitmap.getHeight(), m, false);
        MultiFormatWriter writer = new MultiFormatWriter();
        Hashtable<EncodeHintType, String> hst = new Hashtable<EncodeHintType, String>();
        hst.put(EncodeHintType.CHARACTER_SET, "UTF-8");//      
        BitMatrix matrix = writer.encode(string, format, 400, 400, hst);//         
        int width = matrix.getWidth();//    
        int height = matrix.getHeight();//    
        int halfW = width / 2;
        int halfH = height / 2;
        int[] pixels = new int[width * height];//           *    ，           
        for (int y = 0; y < height; y++) {//        
            for (int x = 0; x < width; x++) {//   
                if (x > halfW - IMAGE_HALFWIDTH && x < halfW + IMAGE_HALFWIDTH
                        && y > halfH - IMAGE_HALFWIDTH
                        && y < halfH + IMAGE_HALFWIDTH) {//           
//          
                    pixels[y * width + x] = mBitmap.getPixel(x - halfW
                            + IMAGE_HALFWIDTH, y - halfH + IMAGE_HALFWIDTH);                } else {
                    if (matrix.get(x, y)) {//      ，    
                        pixels[y * width + x] = 0xff000000;//      
                    }
                }

            }
        }
        Bitmap bitmap = Bitmap.createBitmap(width, height,
                Bitmap.Config.ARGB_8888);
        //         bitmap
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }