Android二维码快速生成和扫描

废话不说直接说流程吧‘

** * Project Name: * Author:wsf * Date: 2017/9/8 10:50 * Notes: */public class EncodingUtils {    /**     * 创建二维码     *     * @param content   content     * @param widthPix  widthPix     * @param heightPix heightPix     * @param logoBm    logoBm     * @return 二维码     */    public static Bitmap createQRCode(String content, int widthPix, int heightPix, Bitmap logoBm) {        try {            if (content == null || "".equals(content)) {                return null;            }            Map<EncodeHintType, Object> hints = new HashMap<>();            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);            // 图像数据转换，使用了矩阵转换            BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, widthPix,                    heightPix, hints);            int[] pixels = new int[widthPix * heightPix];            // 下面这里按照二维码的算法，逐个生成二维码的图片，            // 两个for循环是图片横列扫描的结果            for (int y = 0; y < heightPix; y++) {                for (int x = 0; x < widthPix; x++) {                    if (bitMatrix.get(x, y)) {                        pixels[y * widthPix + x] = 0xff000000;                    } else {                        pixels[y * widthPix + x] = 0xffffffff;                    }                }            }            // 生成二维码图片的格式，使用ARGB_8888            Bitmap bitmap = Bitmap.createBitmap(widthPix, heightPix, Bitmap.Config.ARGB_8888);            bitmap.setPixels(pixels, 0, widthPix, 0, 0, widthPix, heightPix);            if (logoBm != null) {                bitmap = addLogo(bitmap, logoBm);            }            return bitmap;        } catch (WriterException e) {            e.printStackTrace();        }        return null;    }    /**     * 在二维码中间添加Logo图案     */    private static Bitmap addLogo(Bitmap src, Bitmap logo) {        if (src == null) {            return null;        }        if (logo == null) {            return src;        }        //获取图片的宽高        int srcWidth = src.getWidth();        int srcHeight = src.getHeight();        int logoWidth = logo.getWidth();        int logoHeight = logo.getHeight();        if (srcWidth == 0 || srcHeight == 0) {            return null;        }        if (logoWidth == 0 || logoHeight == 0) {            return src;        }        //logo大小为二维码整体大小的1/5        float scaleFactor = srcWidth * 1.0f / 5 / logoWidth;        Bitmap bitmap = Bitmap.createBitmap(srcWidth, srcHeight, Bitmap.Config.ARGB_8888);        try {            Canvas canvas = new Canvas(bitmap);            canvas.drawBitmap(src, 0, 0, null);            canvas.scale(scaleFactor, scaleFactor, srcWidth / 2, srcHeight / 2);            canvas.drawBitmap(logo, (srcWidth - logoWidth) / 2, (srcHeight - logoHeight) / 2, null);            canvas.save(Canvas.ALL_SAVE_FLAG);            canvas.restore();        } catch (Exception e) {            bitmap = null;            e.getStackTrace();        }        return bitmap;    }}

然后在代码中

private void initView() {    bitmap = EncodingUtils.createQRCode("这里就是我要传入的生成二维码的string", 600, 600,BitmapFactory.decodeResource(getResources(), R.mipmap            .icon_l_2));    code.setImageBitmap(bitmap);

需要用到的jar包已上传地址：点击打开链接