chunhunghan / flutter-nfc-reader

PR : Add Android NFC noDevice, disable, enable check . Repeat click start button without click stop button can work fine. Stop and then restart work fine. Continuous read after click start button work fine

Flutter NFC Reader

A new flutter plugin to help developers looking to use internal hardware inside iOS or Android devices for reading NFC tags.

The system activate a pooling reading session that stops automatically once a tag has been recognised. You can also trigger the stop event manually using a dedicated function.

Supported NFC Format

Platform	Supported NFC Tags
Android	NDEF
iOS	NDEF

Installation

Add to pubspec.yaml:

dependencies:
  flutter_nfc_reader:
    git:
      url: git://github.com/matteocrippa/flutter-nfc-reader.git
      ref: master

and then run the shell

flutter packages get

last step import to the project:

import 'package:flutter_nfc_reader/flutter_nfc_reader.dart';

How to use

Android setup

Add those two lines to your AndroidManifest.xml on the top

<uses-permission android:name="android.permission.NFC" />
<uses-feature
        android:name="android.hardware.nfc"
        android:required="true" />

iOS Setup

Atm only Swift based Flutter project are supported.

• Enable Capabilities / Near Field Communication Tag Reading.
• Info.plist file, add Privacy - NFC Scan Usage Description with string value NFC Tag.

Read NFC

This function will return a promise when a read occurs, till that very moment the reading session is open. The promise will return a NfcData model, this model contains:

• id > id of the tag
• content > content of the tag
• error > if any error occurs

Future<void> startNFC() async {
    setState(() {
      _nfcData = NfcData();
      _nfcData.status = NFCStatus.reading;
    });

    print('NFC: Scan started');

    print('NFC: Scan readed NFC tag');
    FlutterNfcReader.read.listen((response) {
      setState(() {
        _nfcData = response;
      });
    });
  }

Stop NFC

Future<void> stopNFC() async {
    NfcData response;

    try {
      print('NFC: Stop scan by user');
      response = await FlutterNfcReader.stop;
    } on PlatformException {
      print('NFC: Stop scan exception');
      response = NfcData(
        id: '',
        content: '',
        error: 'NFC scan stop exception',
        statusMapper: '',
      );
      response.status = NFCStatus.error;
    }

    setState(() {
      _nfcData = response;
    });
  }

For better details look at the demo app.

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing plugin code, view the documentation.

Contributing

Please take a quick look at the contribution guidelines first. If you see a package or project here that is no longer maintained or is not a good fit, please submit a pull request to improve this file. Thank you to all contributors!!