nls 0.0.1

Scan QR with android

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:nls/nls.dart';

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

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

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

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  String qrCode = "";
  final _nlsPlugin = Nls();

  static const EventChannel _eventChannel = EventChannel('nlsresult');
  StreamSubscription? _streamSubscription;

  @override
  void initState() {
    super.initState();
    initPlatformState();
    _streamSubscription =
        _eventChannel.receiveBroadcastStream().listen((value) {
      try {
        print(value);
        setState(() {
          qrCode = value;
        });
      } catch (e, s) {
        print("e:" + e.toString());
        print(s);
      }
    });
  }

  // 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 _nlsPlugin.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
  void dispose() {
    super.dispose();
    _streamSubscription?.cancel();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('NLS SCAN'),
        ),
        body: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            Padding(
              padding: const EdgeInsets.all(10),
              child: Text(qrCode),
            ),
            Padding(
                padding: const EdgeInsets.all(10),
                child: ElevatedButton(
                    onPressed: () {
                      _nlsPlugin.scan();
                    },
                    child: const Text("Scan")))
          ],
        ),
      ),
    );
  }
}