nfc_pro_manager 3.1.3

The industry-grade NFC SDK for Flutter. Supports robust Host Card Emulation (HCE), Identity Emulation, NDEF Read/Write, and ISO-DEP APDU communication with enterprise lifecycle management.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:nfc_pro_manager/nfc_pro_manager.dart';

void main() {
  runApp(const NfcProExampleApp());
}

class NfcProExampleApp extends StatelessWidget {
  const NfcProExampleApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        useMaterial3: true,
        colorSchemeSeed: Colors.deepPurple,
        brightness: Brightness.dark,
      ),
      home: const NfcDashboard(),
    );
  }
}

class NfcDashboard extends StatefulWidget {
  const NfcDashboard({super.key});

  @override
  State<NfcDashboard> createState() => _NfcDashboardState();
}

class _NfcDashboardState extends State<NfcDashboard> {
  String _status = "Ready to Scan";
  String _tagData = "No data yet";
  bool _isNfcAvailable = false;
  bool _isHceSupported = false;

  @override
  void initState() {
    super.initState();
    _checkHardware();
  }

  Future<void> _checkHardware() async {
    final support = await NfcPro.checkSupport();
    setState(() {
      _isNfcAvailable = support.isAvailable;
      _isHceSupported = support.isHceSupported;
    });
  }

  Future<void> _initiateSession() async {
    setState(() => _status = "Searching for Tag...");
    
    try {
      await NfcPro.startSession(
        onDiscovered: (NfcTag tag) {
          setState(() {
            _status = "Tag Detected!";
            _tagData = "UID: ${tag.uid}\nType: ${tag.type}\nContent: ${tag.content ?? 'Empty'}";
          });
        },
        onError: (e) {
          setState(() => _status = "Error: ${e.message}");
        },
      );

      // We can also use the stream
      NfcPro.onTagDiscovered.listen((tag) {
        setState(() {
          _tagData = "Live Update: ${tag.uid}";
        });
      });

    } on NfcException catch (e) {
      setState(() => _status = "System Error: ${e.type}");
    }
  }

  Future<void> _secureLoginDemo() async {
    setState(() => _status = "Authenticating...");
    
    // Simulate a secure challenge-response
    // 1. Start Session
    await NfcPro.startSession(
      onDiscovered: (tag) async {
        // 2. Send APDU Challenge
        final response = await NfcPro.transceive("00A404000E325041592E5359532E444446303100");
        
        if (response != null && response.endsWith("9000")) {
          setState(() => _status = "LOGIN SUCCESS! (Secure APDU)");
        } else {
          setState(() => _status = "Authentication Failed");
        }
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("NFC Pro Manager"),
        actions: [
          IconButton(onPressed: _checkHardware, icon: const Icon(Icons.refresh))
        ],
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            // Hardware Status Card
            _buildStatusHeader(),
            const SizedBox(height: 20),

            // Main Status Display
            Container(
              padding: const EdgeInsets.all(25),
              decoration: BoxDecoration(
                gradient: LinearGradient(colors: [Colors.deepPurple.shade900, Colors.black]),
                borderRadius: BorderRadius.circular(20),
                border: Border.all(color: Colors.deepPurpleAccent.withOpacity(0.5)),
              ),
              child: Column(
                children: [
                  Text(_status, style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold, color: Colors.cyanAccent)),
                  const Divider(height: 30),
                  Text(_tagData, style: const TextStyle(fontFamily: 'monospace', fontSize: 14)),
                ],
              ),
            ),
            const SizedBox(height: 30),

            // Action Buttons
            ElevatedButton.icon(
              onPressed: _initiateSession,
              icon: const Icon(Icons.nfc),
              label: const Text("Start Professional Session"),
              style: ElevatedButton.styleFrom(padding: const EdgeInsets.all(18)),
            ),
            const SizedBox(height: 12),
            
            OutlinedButton.icon(
              onPressed: _secureLoginDemo,
              icon: const Icon(Icons.security),
              label: const Text("Secure Login Demo (APDU)"),
              style: OutlinedButton.styleFrom(padding: const EdgeInsets.all(18)),
            ),
            const SizedBox(height: 30),

            const Text("VIRTUAL CARD CONFIGURATION", style: TextStyle(letterSpacing: 2, fontSize: 12, color: Colors.grey)),
            const SizedBox(height: 10),
            
            TextField(
              decoration: const InputDecoration(
                border: OutlineInputBorder(),
                labelText: "Identity ID to Emulate",
                prefixIcon: Icon(Icons.vibration),
              ),
              onChanged: (val) => NfcPro.setEmulationId(val),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildStatusHeader() {
    return Row(
      children: [
        _StatusChip(label: "NFC", isActive: _isNfcAvailable),
        const SizedBox(width: 10),
        _StatusChip(label: "HCE", isActive: _isHceSupported),
      ],
    );
  }
}

class _StatusChip extends StatelessWidget {
  final String label;
  final bool isActive;
  const _StatusChip({required this.label, required this.isActive});

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
      decoration: BoxDecoration(
        color: isActive ? Colors.green.withOpacity(0.2) : Colors.red.withOpacity(0.2),
        borderRadius: BorderRadius.circular(50),
        border: Border.all(color: isActive ? Colors.green : Colors.red),
      ),
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(isActive ? Icons.check_circle : Icons.error, size: 14, color: isActive ? Colors.green : Colors.red),
          const SizedBox(width: 5),
          Text(label, style: TextStyle(color: isActive ? Colors.green : Colors.red, fontWeight: FontWeight.bold)),
        ],
      ),
    );
  }
}