/**
     * 对二维码图片解码结果进行编码
     *
     * @param str
     * @return
     */
    public static String recode(String str) {
        String formart = "";

        try {
            boolean ISO = Charset.forName("ISO-8859-1").newEncoder()
                    .canEncode(str);
            if (ISO) {
                formart = new String(str.getBytes("ISO-8859-1"), "UTF-8");
            } else {
                formart = str;
            }
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (Exception e){

        }
        return formart;
    }

public static Result handleQRCodeFormBitmap(Bitmap bitmap) {

        Map<DecodeHintType, Object> hints = new EnumMap<>(DecodeHintType.class);
        hints.put(DecodeHintType.CHARACTER_SET, "utf-8");
        hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
        hints.put(DecodeHintType.POSSIBLE_FORMATS, BarcodeFormat.QR_CODE);

        RGBLuminanceSource source = new RGBLuminanceSource(bitmap);
        BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source)); 
        QRCodeReader reader2 = new QRCodeReader();
        Result result = null;
        try {
            result = reader2.decode(bitmap1, hints);
        } catch (Exception e) {
            e.printStackTrace();
            if (source != null) {
                BinaryBitmap bitmap2 = new BinaryBitmap(new GlobalHistogramBinarizer(source)); 
                try {
                    result = reader2.decode(bitmap2, hints);
                } catch (Exception e1) {
                    e1.printStackTrace();
                }
            }
        }
        return result;
    }

public static void saveImageToGallery(Context context, Bitmap bmp) {
        String fileName = System.currentTimeMillis() + ".jpg";
        String filePath = FileUtils.getFilePath(context, "/pictures/qrcode/");
        // 首先保存图片
        File appDir = new File(filePath);
        if (!appDir.exists()) {
            appDir.mkdir();
        }
        File file = new File(appDir, fileName);
        try {
            FileOutputStream fos = new FileOutputStream(file);
            bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
            fos.flush();
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e){

        }

        // 其次把文件插入到系统图库
        ContentValues values = new ContentValues();
        values.put(MediaStore.Images.Media.DATA, file.getAbsolutePath());
        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
        Uri uri = context.getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
        // 最后通知图库更新
        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(file)));
    }