zxing生成二维码和条码

    /***
     * 生成二维码方法
     * @param str 生成内容
     * @param widthHeight 宽度和高度
     * @return
     * @throws WriterException
     */
    public static Bitmap Create2DCode(String str,BarcodeFormat barcodeFormat,int widthHeight) throws WriterException {
        Hashtable<EncodeHintType, String> hints = new Hashtable<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
        BitMatrix matrix = new MultiFormatWriter().encode(str, barcodeFormat, widthHeight, widthHeight);
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        //二维矩阵转为一维像素数组,也就是一直横着排了
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                if (matrix.get(x, y)) {
                    pixels[y * width + x] = 0xff000000;
                }else{

                    pixels[y * width + x] = 0xffffffff;

　　　　　　　　　　}
            }
        }

        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        //通过像素数组生成bitmap,具体参考api
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }

    public static Bitmap creatEAN13(String str,int  paramsWidth,int  paramsHeight) throws WriterException{
        Hashtable<EncodeHintType, String> hints = new Hashtable<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
        BitMatrix matrix = new MultiFormatWriter().encode(str, BarcodeFormat.EAN_13
                , paramsWidth, paramsHeight);
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        //二维矩阵转为一维像素数组,也就是一直横着排了
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                if (matrix.get(x, y)) {
                    pixels[y * width + x] = 0xff000000;
                }
            }
        }

        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        //通过像素数组生成bitmap,具体参考api
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }


    public static Bitmap creatUPCA(String str,int  paramsWidth,int  paramsHeight) throws WriterException{
        Hashtable<EncodeHintType, String> hints = new Hashtable<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
        BitMatrix matrix = new MultiFormatWriter().encode(str, BarcodeFormat.UPC_A, paramsWidth, paramsHeight);
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        //二维矩阵转为一维像素数组,也就是一直横着排了
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                if (matrix.get(x, y)) {
                    pixels[y * width + x] = 0xff000000;
                }
            }
        }
        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        //通过像素数组生成bitmap,具体参考api
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }
    

导入zxing包 

compile 'com.google.zxing:core:3.3.3@jar'