Register to NFC event

registerNfc.java

    public static void enableForegroundDispatch(Activity activity, NfcAdapter adapter) {
        Intent intent = activity.getIntent();
        intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
        if(adapter.isEnabled()) {
            PendingIntent tagIntent = PendingIntent.getActivity(activity, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
            IntentFilter iso = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
            adapter.enableForegroundDispatch(activity, tagIntent, new IntentFilter[]{iso},
                    new String[][]{new String[]{IsoDep.class.getName()}});
        }
    }