dumpTagData method for the NFC Reader Tutorial

DumpTagData.java

private String dumpTagData(Tag tag) {
    StringBuilder sb = new StringBuilder();
    byte[] id = tag.getId();
    sb.append("ID (hex): ").append(toHex(id)).append('\n');
    sb.append("ID (reversed hex): ").append(toReversedHex(id)).append('\n');
    sb.append("ID (dec): ").append(toDec(id)).append('\n');
    sb.append("ID (reversed dec): ").append(toReversedDec(id)).append('\n');

    String prefix = "android.nfc.tech.";
    sb.append("Technologies: ");
    for (String tech : tag.getTechList()) {
        sb.append(tech.substring(prefix.length()));
        sb.append(", ");
    }

    sb.delete(sb.length() - 2, sb.length());

    for (String tech : tag.getTechList()) {
        if (tech.equals(MifareClassic.class.getName())) {
            sb.append('\n');
            String type = "Unknown";

            try {
                MifareClassic mifareTag = MifareClassic.get(tag);

                switch (mifareTag.getType()) {
                    case MifareClassic.TYPE_CLASSIC:
                        type = "Classic";
                        break;
                    case MifareClassic.TYPE_PLUS:
                        type = "Plus";
                        break;
                    case MifareClassic.TYPE_PRO:
                        type = "Pro";
                        break;
                }
                sb.append("Mifare Classic type: ");
                sb.append(type);
                sb.append('\n');

                sb.append("Mifare size: ");
                sb.append(mifareTag.getSize() + " bytes");
                sb.append('\n');

                sb.append("Mifare sectors: ");
                sb.append(mifareTag.getSectorCount());
                sb.append('\n');

                sb.append("Mifare blocks: ");
                sb.append(mifareTag.getBlockCount());
            } catch (Exception e) {
                sb.append("Mifare classic error: " + e.getMessage());
            }
        }

        if (tech.equals(MifareUltralight.class.getName())) {
            sb.append('\n');
            MifareUltralight mifareUlTag = MifareUltralight.get(tag);
            String type = "Unknown";
            switch (mifareUlTag.getType()) {
                case MifareUltralight.TYPE_ULTRALIGHT:
                    type = "Ultralight";
                    break;
                case MifareUltralight.TYPE_ULTRALIGHT_C:
                    type = "Ultralight C";
                    break;
            }
            sb.append("Mifare Ultralight type: ");
            sb.append(type);
        }
    }

    return sb.toString();
}