yoco_flutter_sdk 0.0.1

An SDK to accept card payments with Yoco.

example/lib/main.dart

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

import 'package:flutter/services.dart';
import 'package:yoco_flutter_sdk/yoco_flutter_sdk.dart';
import 'package:nfc_manager/nfc_manager.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

Stream<String> nfc(NfcManager manager) async* {
  StreamController<String> streamController = StreamController<String>();

  streamController.add("Checking availability: ");
  // Check availability
  bool isAvailable = await manager.isAvailable();
  streamController.add('NFC available: $isAvailable');

  manager.startSession(
    onDiscovered: (NfcTag tag) async {
      // Do something with an NfcTag instance.
      streamController.add('NFC tag: ${tag.handle}');
    },
  );

  streamController.add("Waiting for NFC tag...");

  yield* streamController.stream;
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  String _nfcOutput = '';
  final _yocoFlutterSdkPlugin = YocoFlutterSdk();

  @override
  void initState() {
    super.initState();
    initPlatformState();
    nfc(NfcManager.instance);
  }

  void stopNfc(NfcManager manager) {
    // Stop Session
    manager.stopSession();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion = await _yocoFlutterSdkPlugin.getPlatformVersion() ??
          'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              TextButton(
                onPressed: () async {
                  setState(() {
                    _nfcOutput = "";
                  });
                  await for (final output in nfc(NfcManager.instance)) {
                    setState(() {
                      _nfcOutput += "$output\n\n";
                    });
                  }
                },
                child: const Text('Listen for NFC tags'),
              ),
              TextButton(
                  onPressed: () {
                    stopNfc(NfcManager.instance);
                    setState(() {
                      _nfcOutput = "Nfc stopped.";
                    });
                  },
                  child: const Text('Stop NFC')),
              Padding(
                padding: const EdgeInsets.all(8.0),
                child: Text(_nfcOutput),
              ),
            ],
          ),
        ),
      ),
    );
  }
}