Android NFC development using Fragment-Collection of common programming errors

The online source codes for NFC are done using Activity. I would like to ask if it is possible to develop using Fragment instead?

This is the error i hit when i run the codes

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mobile.countmein/com.mobile.countmein.activities.NFCScanner}: java.lang.ClassCastException: com.mobile.countmein.activities.NFCScanner cannot be cast to android.app.Activity

public class TagViewer extends Fragment {

private static final SimpleDateFormat TIME_FORMAT = new SimpleDateFormat();
private LinearLayout mTagContent;

private NfcAdapter mAdapter;
private PendingIntent mPendingIntent;
private NdefMessage mNdefPushMessage;

private AlertDialog mDialog;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    return inflater.inflate(R.layout.tag_viewer, container, false);
}


public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

      mTagContent = (LinearLayout)view.findViewById(R.id.list);
        resolveIntent(getActivity().getIntent());

        mDialog = new AlertDialog.Builder(getActivity()).setNeutralButton("Ok", null).create();

        mAdapter = NfcAdapter.getDefaultAdapter(getActivity());
        if (mAdapter == null) {
            showMessage(R.string.error, R.string.no_nfc);
        }

        mPendingIntent = PendingIntent.getActivity(getActivity(), 0,
                new Intent(getActivity(), getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
        mNdefPushMessage = new NdefMessage(new NdefRecord[] { newTextRecord(
                "Message from NFC Reader :-)", Locale.ENGLISH, true) });

}


private void showMessage(int title, int message) {
    mDialog.setTitle(title);
    mDialog.setMessage(getText(message));
    mDialog.show();
}

private NdefRecord newTextRecord(String text, Locale locale, boolean encodeInUtf8) {
    byte[] langBytes = locale.getLanguage().getBytes(Charset.forName("US-ASCII"));

    Charset utfEncoding = encodeInUtf8 ? Charset.forName("UTF-8") : Charset.forName("UTF-16");
    byte[] textBytes = text.getBytes(utfEncoding);

    int utfBit = encodeInUtf8 ? 0 : (1 = 0; --i) {
        int b = bytes[i] & 0xff;
        if (b < 0x10)
            sb.append('0');
        sb.append(Integer.toHexString(b));
        if (i > 0) {
            sb.append(" ");
        }
    }
    return sb.toString();
}

private long getDec(byte[] bytes) {
    long result = 0;
    long factor = 1;
    for (int i = 0; i < bytes.length; ++i) {
        long value = bytes[i] & 0xffl;
        result += value * factor;
        factor *= 256l;
    }
    return result;
}

void buildTagViews(NdefMessage[] msgs) {
    if (msgs == null || msgs.length == 0) {
        return;
    }
    LayoutInflater inflater = LayoutInflater.from(getActivity());
    LinearLayout content = mTagContent;

    // Parse the first message in the list
    // Build views for all of the sub records
    Date now = new Date();
    List records = NdefMessageParser.parse(msgs[0]);
    final int size = records.size();
    for (int i = 0; i < size; i++) {
        TextView timeView = new TextView(getActivity());
        timeView.setText(TIME_FORMAT.format(now));
        content.addView(timeView, 0);
        ParsedNdefRecord record = records.get(i);
        content.addView(record.getView(getActivity(), inflater, content, i), 1 + i);
        content.addView(inflater.inflate(R.layout.tag_divider, content, false), 2 + i);
    }
}

}

I removed the following because a fragment does not have the method:

@Override 
public void onNewIntent(Intent intent) {
  setIntent(intent);
  resolveIntent(intent);
}