nfc_util library

Cross-platform NFC.

This library is the common path: check availability, run a reader session, get tags. Anything platform-specific lives one import away and is never hidden behind this one:

package:nfc_util/android.dart -- reader flags, adapter state, secure NFC, foreground dispatch, tags delivered by intent, host card emulation, and the android.nfc.tech classes.
package:nfc_util/ios.dart -- alert messages, polling control, Apple Value Added Services, background NDEF delivery, and the CoreNFC tag protocols.
package:nfc_util/ndef.dart -- NDEF values, the wire codec, and typed records.

The two platform libraries can be imported together; give at least one a prefix, since both name a handful of the same concepts.

import 'package:nfc_util/nfc_util.dart';
import 'package:nfc_util/ndef.dart';
import 'package:nfc_util/android.dart' as android;

await NfcUtil.instance.startSession(
  onDiscovered: (tag) async {
    final classic = android.MifareClassic.from(tag);
    if (classic != null) {
      await classic.authenticateSectorWithKeyA(sectorIndex: 0, key: key);
    }
    await NfcUtil.instance.stopSession();
  },
);

Classes

Enums

nfc_util package

nfc_util library