"Exporting Levels Into QR Codes Using ZXing" for GameDevAlgorithms.com

ExportActivity.java

    private void populateCard() {
        ...
        StorageHelper.fillWithQrDrawable((ImageView) findViewById(R.id.puzzleQrCode), exportedText);
    }

PuzzleShareHelper.java

    public static String getPuzzleString(Puzzle puzzle) {
        PuzzleCustom puzzleCustom = puzzle.getCustomData();
        StringBuilder sb = new StringBuilder();
        sb.append(puzzleCustom.getName()).append(sectionDelimiter)
                .append(puzzleCustom.getDescription()).append(sectionDelimiter)
                .append(puzzleCustom.getAuthor()).append(sectionDelimiter)
                .append(puzzle.getParMoves()).append(sectionDelimiter)
                .append(puzzle.getParTime()).append(sectionDelimiter);

        List<Tile> tiles = puzzle.getTiles();
        for (Tile tile : tiles) {
            sb.append(tile.getTileTypeId()).append(tileElementDelimiter)
                    .append(tile.getX()).append(tileElementDelimiter)
                    .append(tile.getY()).append(tileElementDelimiter)
                    .append(tile.getRotation()).append(tileDelimiter);
        }
        return sb.toString();
    }

StorageHelper.java

    public final static int WHITE = 0xFFFFFFFF;
    public final static int BLACK = 0xFF000000;
    public final static int WIDTH = 400;
    public final static int HEIGHT = 400;
    private static final int screenshotSize = 500;

    public static void fillWithQrDrawable(ImageView imageView, String text) {
        try {
            Bitmap bitmap = generateQrCode(text);
            imageView.setImageBitmap(bitmap);
        } catch (WriterException e) {
            e.printStackTrace();
        }
    }

    private static Bitmap generateQrCode(String str) throws WriterException {
        BitMatrix result;
        try {
            Map<EncodeHintType, Object> hints = new EnumMap<>(EncodeHintType.class);
            hints.put(EncodeHintType.MARGIN, 0);
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
            result = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
        } catch (IllegalArgumentException iae) {
            // Unsupported format
            return null;
        }

        int width = result.getWidth();
        int height = result.getHeight();
        int[] pixels = new int[width * height];
        for (int y = 0; y < height; y++) {
            int offset = y * width;
            for (int x = 0; x < width; x++) {
                pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
            }
        }

        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }