rawsensors 0.0.3

A flutter plugin that lets you access raw data from sensors, the goal of this plugin is to expose every sensors from the Android and IOS framework.

example/lib/main.dart

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

import 'dart:async';

void main() => runApp(MaterialApp(
      title: 'rawsensors example',
      home: HomeScreen(),
    ));

class HomeScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('rawsensors example'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: SensorType.values
                .map((t) => RaisedButton(
                      child: Text(t.toString().split('.').last),
                      onPressed: () {
                        Navigator.push(
                            context,
                            MaterialPageRoute(
                                builder: (context) => SensorScreen(t)));
                      },
                    ))
                .toList(),
          ),
        ),
      ),
    );
  }
}

class SensorScreen extends StatefulWidget {
  final SensorType sensorType;

  SensorScreen(this.sensorType);

  @override
  _SensorScreenState createState() => _SensorScreenState();
}

class _SensorScreenState extends State<SensorScreen>
    with WidgetsBindingObserver {
  StreamSubscription<List<double>> _streamSubscription;
  List<double> _data;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.sensorType.toString().split('.').last),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: _data
                  ?.asMap()
                  ?.entries
                  ?.map((entry) => Text(
                      'data[${entry.key}] = ${entry.value.toStringAsFixed(10)}'))
                  ?.toList() ??
              <Widget>[Text('Unknown')],
        ),
      ),
    );
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if (state == AppLifecycleState.resumed) {
      _subscribeToSensorDataStream();
    } else {
      _unsubscribeFromSensorDataStream();
    }
  }

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);

    _subscribeToSensorDataStream();
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();

    _unsubscribeFromSensorDataStream();
  }

  void _subscribeToSensorDataStream() {
    RawSensors().getSensorStream(widget.sensorType).then((Stream sensorStream) {
      _streamSubscription = sensorStream?.listen((dynamic data) {
        setState(() {
          _data = data;
        });
      });
    });
  }

  void _unsubscribeFromSensorDataStream() {
    _streamSubscription?.cancel();
  }
}