mindwave_mobile2 1.0.0

Flutter interface for Neurosky Mindwave Mobile 2 headset.

example/lib/main.dart

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

import 'screens/bluetooth_off_screen.dart';
import 'screens/scan_screen.dart';

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

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

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

class _MyAppState extends State<MyApp> {
  BluetoothAdapterState _adapterState = BluetoothAdapterState.unknown;
  late StreamSubscription<BluetoothAdapterState> _adapterStateStateSubscription;

  @override
  void initState() {
    super.initState();
    _adapterStateStateSubscription =
        FlutterBluePlus.adapterState.listen((state) {
      _adapterState = state;
      if (mounted) {
        setState(() {});
      }
    });
  }

  @override
  void dispose() {
    _adapterStateStateSubscription.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    Widget screen = _adapterState == BluetoothAdapterState.on
        ? const ScanScreen()
        : BluetoothOffScreen(adapterState: _adapterState);

    return MaterialApp(
      color: Colors.lightBlue,
      home: screen,
      navigatorObservers: [BluetoothAdapterStateObserver()],
    );
  }
}

class BluetoothAdapterStateObserver extends NavigatorObserver {
  StreamSubscription<BluetoothAdapterState>? _adapterStateSubscription;

  @override
  void didPush(Route route, Route? previousRoute) {
    super.didPush(route, previousRoute);
    if (route.settings.name == '/DeviceScreen') {
      _adapterStateSubscription ??=
          FlutterBluePlus.adapterState.listen((state) {
        if (state != BluetoothAdapterState.on) {
          navigator?.pop();
        }
      });
    }
  }

  @override
  void didPop(Route route, Route? previousRoute) {
    super.didPop(route, previousRoute);
    // Cancel the subscription when the route is popped
    _adapterStateSubscription?.cancel();
    _adapterStateSubscription = null;
  }
}