private static HashMap<String, Integer> getTechStringToCodeMap() {
    HashMap<String, Integer> techStringToCodeMap = new HashMap<String, Integer>();

    techStringToCodeMap.put(IsoDep.class.getName(), TagTechnology.ISO_DEP);
    techStringToCodeMap.put(MifareClassic.class.getName(), TagTechnology.MIFARE_CLASSIC);
    techStringToCodeMap.put(MifareUltralight.class.getName(), TagTechnology.MIFARE_ULTRALIGHT);
    techStringToCodeMap.put(Ndef.class.getName(), TagTechnology.NDEF);
    techStringToCodeMap.put(NdefFormatable.class.getName(), TagTechnology.NDEF_FORMATABLE);
    techStringToCodeMap.put(NfcA.class.getName(), TagTechnology.NFC_A);
    techStringToCodeMap.put(NfcB.class.getName(), TagTechnology.NFC_B);
    techStringToCodeMap.put(NfcF.class.getName(), TagTechnology.NFC_F);
    techStringToCodeMap.put(NfcV.class.getName(), TagTechnology.NFC_V);
    techStringToCodeMap.put(NfcBarcode.class.getName(), TagTechnology.NFC_BARCODE);

    return techStringToCodeMap;
}
 

private String[] generateTechStringList(int[] techList) {
    final int size = techList.length;
    String[] strings = new String[size];
    for (int i = 0; i < size; i++) {
        switch (techList[i]) {
            case TagTechnology.ISO_DEP:
                strings[i] = IsoDep.class.getName();
                break;
            case TagTechnology.MIFARE_CLASSIC:
                strings[i] = MifareClassic.class.getName();
                break;
            case TagTechnology.MIFARE_ULTRALIGHT:
                strings[i] = MifareUltralight.class.getName();
                break;
            case TagTechnology.NDEF:
                strings[i] = Ndef.class.getName();
                break;
            case TagTechnology.NDEF_FORMATABLE:
                strings[i] = NdefFormatable.class.getName();
                break;
            case TagTechnology.NFC_A:
                strings[i] = NfcA.class.getName();
                break;
            case TagTechnology.NFC_B:
                strings[i] = NfcB.class.getName();
                break;
            case TagTechnology.NFC_F:
                strings[i] = NfcF.class.getName();
                break;
            case TagTechnology.NFC_V:
                strings[i] = NfcV.class.getName();
                break;
            case TagTechnology.NFC_BARCODE:
                strings[i] = NfcBarcode.class.getName();
                break;
            default:
                throw new IllegalArgumentException("Unknown tech type " + techList[i]);
        }
    }
    return strings;
}