onCreate method for the NFC Reader Tutorial

OnCreate.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    text = (TextView) findViewById(R.id.text);
    nfcAdapter = NfcAdapter.getDefaultAdapter(this);

    if (nfcAdapter == null) {
        Toast.makeText(this, "No NFC", Toast.LENGTH_SHORT).show();
        finish();
        return;
    }

    pendingIntent = PendingIntent.getActivity(this, 0,
            new Intent(this, this.getClass())
                    .addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
}