flutter_ysdk 0.1.0

A Flutter plugin for integrating with MoreFun POS YSDK (Android). Supports Device Info, Printer, and NFC (Mifare/TypeA, NTAG, CPU).

example/lib/main.dart

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

import 'package:flutter_ysdk/flutter_ysdk.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: const HomePage(),
    );
  }
}

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

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final _ysdk = FlutterYsdk();
  String _status = 'Not Connected';
  String _deviceInfo = 'Unknown';
  final _textController = TextEditingController(text: 'Hello from Flutter YSDK!');

  @override
  void initState() {
    super.initState();
    // Verify platform version
    initPlatformState();
  }

  Future<void> initPlatformState() async {
    String? version;
    try {
      version = await _ysdk.getPlatformVersion();
    } catch (e) {
      version = 'Failed to get platform version.';
    }

    if (!mounted) return;
    print('Running on: $version');
  }

  Future<void> _bindService() async {
    setState(() {
      _status = 'Binding...';
    });
    try {
      final success = await _ysdk.bind();
      setState(() {
        _status = success ? 'Connected' : 'Bind Failed';
      });
    } catch (e) {
      setState(() {
        _status = 'Error: $e';
      });
    }
  }

  Future<void> _getDeviceInfo() async {
    if (_status != 'Connected') {
      setState(() => _deviceInfo = 'Please connect first');
      return;
    }
    
    try {
      final info = await _ysdk.getDeviceInfo();
      setState(() {
        _deviceInfo = info.toString();
      });
    } catch (e) {
      setState(() {
        _deviceInfo = 'Error: $e';
      });
    }
  }

  Future<void> _printText() async {
    if (_status != 'Connected') {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Please connect first')),
      );
      return;
    }

    try {
      await _ysdk.printText(_textController.text);
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Print command sent')),
      );
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Print error: $e')),
      );
    }
  }

  // NFC Status State
  String _nfcMessage = 'Ready to Scan';
  StreamSubscription? _nfcSubscription;

  Future<void> _startNfcListener() async {
    _nfcSubscription = _ysdk.nfcStatus.listen((status) {
      setState(() {
        _nfcMessage = status;
      });
    });
  }

  @override
  void dispose() {
    _nfcSubscription?.cancel();
    _textController.dispose();
    super.dispose();
  }

  Future<void> _runNfcScan(String mode) async {
    if (_status != 'Connected') {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Please connect first')),
      );
      return;
    }

    // Ensure listener is active
    if (_nfcSubscription == null) _startNfcListener();

    setState(() => _nfcMessage = 'Starting $mode scan...');
    
    try {
      String? result;
      if (mode == 'CpuRF') {
        result = await _ysdk.searchCpuRfCard();
      } else if (mode == 'TypeA') {
        result = await _ysdk.searchCpuTypeA();
      } else if (mode == 'NTAG') {
        result = await _ysdk.searchNtag();
      }
      // Result success handled by stream updates, but we can log unique ID here too if returned
      print('Scan Result: $result');
    } catch (e) {
      setState(() => _nfcMessage = 'Error: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Flutter YSDK Example'),
        actions: [
            IconButton(
                icon: const Icon(Icons.stop_circle_outlined),
                onPressed: () => _ysdk.stopSearch(),
                tooltip: 'Stop NFC Search',
            )
        ],
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Text('Status: $_status', style: Theme.of(context).textTheme.titleLarge),
            const SizedBox(height: 16),
            ElevatedButton(
              onPressed: _bindService,
              child: const Text('Connect to Device Service'),
            ),
            const Divider(),
            Text('Device Info:', style: Theme.of(context).textTheme.titleMedium),
            Text(_deviceInfo),
            ElevatedButton(
              onPressed: _getDeviceInfo,
              child: const Text('Get Device Info'),
            ),
            const Divider(),
            
            Text('NFC Status:', style: Theme.of(context).textTheme.titleMedium),
            Container(
                padding: const EdgeInsets.all(8),
                color: Colors.grey[200],
                child: Text(_nfcMessage, style: const TextStyle(fontWeight: FontWeight.bold))
            ),
            const SizedBox(height: 8),
            Wrap(
                spacing: 8,
                children: [
                    ElevatedButton(
                        onPressed: () => _runNfcScan('CpuRF'),
                        child: const Text('Scan (Generic)'),
                    ),
                    ElevatedButton(
                        onPressed: () => _runNfcScan('TypeA'),
                        child: const Text('Scan (Type A)'),
                    ),
                    ElevatedButton(
                        onPressed: () => _runNfcScan('NTAG'),
                        child: const Text('Scan (NTAG)'),
                    ),
                ]
            ),

            const Divider(),
            TextField(
              controller: _textController,
              decoration: const InputDecoration(
                labelText: 'Text to Print',
                border: OutlineInputBorder(),
              ),
            ),
            const SizedBox(height: 8),
            ElevatedButton(
              onPressed: _printText,
              child: const Text('Print Text'),
            ),
          ],
        ),
      ),
    );
  }
}