flutter_sensors 1.0.1

A flutter plugin to access the available sensors of the device.

example/lib/main.dart

import 'dart:async';

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

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  bool _accelAvailable = false;
  bool _gyroAvailable = false;
  List<double> _accelData = List.filled(3, 0.0);
  List<double> _gyroData = List.filled(3, 0.0);
  StreamSubscription? _accelSubscription;
  StreamSubscription? _gyroSubscription;

  @override
  void initState() {
    _checkAccelerometerStatus();
    _checkGyroscopeStatus();
    super.initState();
  }

  @override
  void dispose() {
    _stopAccelerometer();
    _stopGyroscope();
    super.dispose();
  }

  void _checkAccelerometerStatus() async {
    await SensorManager()
        .isSensorAvailable(Sensors.ACCELEROMETER)
        .then((result) {
      setState(() {
        _accelAvailable = result;
      });
    });
  }

  Future<void> _startAccelerometer() async {
    if (_accelSubscription != null) return;
    if (_accelAvailable) {
      final stream = await SensorManager().sensorUpdates(
        sensorId: Sensors.ACCELEROMETER,
        interval: Sensors.SENSOR_DELAY_FASTEST,
      );
      _accelSubscription = stream.listen((sensorEvent) {
        setState(() {
          _accelData = sensorEvent.data;
        });
      });
    }
  }

  void _stopAccelerometer() {
    if (_accelSubscription == null) return;
    _accelSubscription?.cancel();
    _accelSubscription = null;
  }

  void _checkGyroscopeStatus() async {
    await SensorManager().isSensorAvailable(Sensors.GYROSCOPE).then((result) {
      setState(() {
        _gyroAvailable = result;
      });
    });
  }

  Future<void> _startGyroscope() async {
    if (_gyroSubscription != null) return;
    if (_gyroAvailable) {
      final stream =
          await SensorManager().sensorUpdates(sensorId: Sensors.GYROSCOPE);
      _gyroSubscription = stream.listen((sensorEvent) {
        setState(() {
          _gyroData = sensorEvent.data;
        });
      });
    }
  }

  void _stopGyroscope() {
    if (_gyroSubscription == null) return;
    _gyroSubscription?.cancel();
    _gyroSubscription = null;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Flutter Sensors Example'),
        ),
        body: Container(
          padding: EdgeInsets.all(16.0),
          alignment: AlignmentDirectional.topCenter,
          child: Column(
            children: <Widget>[
              Text(
                "Accelerometer Test",
                textAlign: TextAlign.center,
              ),
              Text(
                "Accelerometer Enabled: $_accelAvailable",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Text(
                "[0](X) = ${_accelData[0]}",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Text(
                "[1](Y) = ${_accelData[1]}",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Text(
                "[2](Z) = ${_accelData[2]}",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  MaterialButton(
                    child: Text("Start"),
                    color: Colors.green,
                    onPressed:
                        _accelAvailable ? () => _startAccelerometer() : null,
                  ),
                  Padding(
                    padding: EdgeInsets.all(8.0),
                  ),
                  MaterialButton(
                    child: Text("Stop"),
                    color: Colors.red,
                    onPressed:
                        _accelAvailable ? () => _stopAccelerometer() : null,
                  ),
                ],
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Text(
                "Gyroscope Test",
                textAlign: TextAlign.center,
              ),
              Text(
                "Gyroscope Enabled: $_gyroAvailable",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Text(
                "[0](X) = ${_gyroData[0]}",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Text(
                "[1](Y) = ${_gyroData[1]}",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Text(
                "[2](Z) = ${_gyroData[2]}",
                textAlign: TextAlign.center,
              ),
              Padding(padding: EdgeInsets.only(top: 16.0)),
              Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
                  MaterialButton(
                    child: Text("Start"),
                    color: Colors.green,
                    onPressed: _gyroAvailable ? () => _startGyroscope() : null,
                  ),
                  Padding(
                    padding: EdgeInsets.all(8.0),
                  ),
                  MaterialButton(
                    child: Text("Stop"),
                    color: Colors.red,
                    onPressed: _gyroAvailable ? () => _stopGyroscope() : null,
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}