public class QRCodeUtils {

    /**
     * 建立二維碼（有白邊）
     *
     * @param string
     * @return
     */
    public static Bitmap createQRCode(String string, int width, int height) {
        return createQRCode(string, width, height, false);
    }

    /**
     * 建立二維碼（無白邊）
     *
     * @param string
     * @param
 
 width
     * @param height
     * @return
     */
    public static Bitmap createQRCodeNoWhiteBorder(String string, int width, int height) {
        return createQRCode(string, width, height, true);
    }

    /**
     * 建立二維碼
     *
     * @param string
     * @param width
     * @param height
     * @param
 
 isDelWhiteBorder
     * @return
     */
    private static Bitmap createQRCode(String string, int width, int height, boolean isDelWhiteBorder) {
        try {
            Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8"
 
);
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
            hints.put(EncodeHintType.MARGIN, 1);
            BitMatrix matrix = new QRCodeWriter().encode(string, BarcodeFormat.QR_CODE, width, height);
            if (isDelWhiteBorder) {
                matrix = deleteWhite(matrix);//刪除白邊
            }
            width = matrix.getWidth();
            height = matrix.getHeight();
            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] = Color.TRANSPARENT;
                        // 設定二維碼顏色 順序是 左上 右上 左下 右下
                        if (x < width / 2 && y < height / 2) {
                            pixels[y * width + x] = 0xFF0094FF;// 藍色
                            Integer.toHexString(new Random().nextInt());
                        } else if (x > width / 2 && y < height / 2) {
                            pixels[y * width + x] = Color.CYAN;// 青色
                        } else if (x < width / 2 && y > height / 2) {
                            pixels[y * width + x] = 0xFFFED545;// 黃色
                        } else if (x > width / 2 && y > height / 2) {
                            pixels[y * width + x] = 0xFF5ACF00;// 綠色
                        } else {
                            // pixels[y * width + x] = Color.BLACK;// 黑色
                            pixels[y * width + x] = Color.TRANSPARENT;// 透明
                        }
                        //pixels[y * width + x] = Color.BLACK;
                    } else {
                        //pixels[y * width + x] = Color.WHITE;//白色
                        pixels[y * width + x] = Color.TRANSPARENT;// 透明
                    }
                }
            }
            Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
            bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
            return bitmap;
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * 刪除二維碼生成後的白色邊框
     *
     * @param matrix
     * @return
     */
    private static BitMatrix deleteWhite(BitMatrix matrix) {
        int[] rec = matrix.getEnclosingRectangle();
        int resWidth = rec[2] + 1;
        int resHeight = rec[3] + 1;

        BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
        resMatrix.clear();
        for (int i = 0; i < resWidth; i++) {
            for (int j = 0; j < resHeight; j++) {
                if (matrix.get(i + rec[0], j + rec[1]))
                    resMatrix.set(i, j);
            }
        }
        return resMatrix;
    }
}