二维码生成与解析

private void createImage() {
        try {
            // 需要引入core包
            QRCodeWriter writer = new QRCodeWriter();


            // 把输入的文本转为二维码
            BitMatrix martix = writer.encode(info, BarcodeFormat.QR_CODE,
                    QR_WIDTH, QR_HEIGHT);

            System.out.println("w:" + martix.getWidth() + "h:"
                    + martix.getHeight());

            Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            BitMatrix bitMatrix = new QRCodeWriter().encode(info,
                    BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
            int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
            for (int y = 0; y < QR_HEIGHT; y++) {
                for (int x = 0; x < QR_WIDTH; x++) {
                    if (bitMatrix.get(x, y)) {
                        pixels[y * QR_WIDTH + x] = 0xff000000;
                    } else {
                        pixels[y * QR_WIDTH + x] = 0xffffffff;
                    }

                }
            }

            Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,
                    Bitmap.Config.ARGB_8888);

            bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
            iv_code.setImageBitmap(bitmap);

        } catch (WriterException e) {
            e.printStackTrace();
        }
    }
//解析
private void scanningImage() {

        Map<DecodeHintType, String> hints = new HashMap<DecodeHintType, String>();
        hints.put(DecodeHintType.CHARACTER_SET, "utf-8");

        // 获得待解析的图片
        Bitmap bitmap = ((BitmapDrawable) qr_image.getDrawable()).getBitmap();
        RGBLuminanceSource source = new RGBLuminanceSource(bitmap);
        BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));
        QRCodeReader reader = new QRCodeReader();
        Result result;
        try {
            result = reader.decode(bitmap1, hints);
            // 得到解析后的文字
            qr_result.setText(result.getText());
        } catch (NotFoundException e) {
            e.printStackTrace();
        } catch (ChecksumException e) {
            e.printStackTrace();
        } catch (FormatException e) {
            e.printStackTrace();
        }
    }