二维码生成

image= (ImageView) findViewById(R.id.images);

Bitmap bitmap =  generateBitmap

("http://blog.csdn.net/yanzhenjie1003/article/details/52503533", 400, 400);
image.setImageBitmap(bitmap);

//生成二维码
private Bitmap generateBitmap(String content, int width, int height) {
    QRCodeWriter qrCodeWriter = new QRCodeWriter();
    Map hints = new HashMap<>();
    hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
    try {
        BitMatrix encode = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, width, height);
        int[] pixels = new int[width * height];
        for (int i = 0; i < height; i++) {
            for (int j = 0; j < width; j++) {
                if (encode.get(j, i)) {
                    pixels[i * width + j] = 0x00000000;
                } else {
                    pixels[i * width + j] = 0xffffffff;
                }
            }
        }
        return Bitmap.createBitmap(pixels, 0, width, width, height, Bitmap.Config.RGB_565);
    } catch (WriterException e) {
        e.printStackTrace();
    }
    return null;
}