How To Use Device Sensors Using Flutter Android App

Posted By Bajarangi soft , Posted On 06-11-2020

We’ll talk about how to read events from device in built sensors with a flutter app.First, import this package, sensors from pub site.

How To Use Device Sensors Using Flutter Android App

Device Sensors
Step 1
We cannot directly remove the time stamp from Device Sensors but using the intl.dart package we can easily filter the date stamp from time stamp. So open your flutter project’s pubspec.yaml in code .

dependencies:
  flutter:
    sdk: flutter
  sensors: ^0.4.2+6

Step 2
After done saving the pubspec.yaml file, Open your flutter project root folder in Command Prompt or Terminal and execute flutter pub get command.

flutter pub get

Step 3
Open your project’s main.dart file and import material.dart package.

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

Complete Code For Device Sensors In Flutter
main.dart

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomeScreen(),
    );
  }
}

class HomeScreen extends StatefulWidget {
  @override
  _HomeScreenState createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  @override
  List<double> _accelerometerValues;
  List<double> _userAccelerometerValues;
  List<double> _gyroscopeValues;
  List<StreamSubscription<dynamic>> _streamSubscriptions =
  <StreamSubscription<dynamic>>[];

  @override
  void initState() {
    super.initState();

    //Accelerometer events
    _streamSubscriptions
        .add(accelerometerEvents.listen((AccelerometerEvent event) {
      setState(() {
        _accelerometerValues = <double>[event.x, event.y, event.z];
      });
    }));

    //UserAccelerometer events
    _streamSubscriptions
        .add(userAccelerometerEvents.listen((UserAccelerometerEvent event) {
      setState(() {
        _userAccelerometerValues = <double>[event.x, event.y, event.z];
      });
    }));

    //UserAccelerometer events
    _streamSubscriptions.add(gyroscopeEvents.listen((GyroscopeEvent event) {
      setState(() {
        _gyroscopeValues = <double>[event.x, event.y, event.z];
      });
    }));
  }

  @override
  void dispose() {
    for (StreamSubscription<dynamic> sub in _streamSubscriptions) {
      sub.cancel();
    }
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final List<String> accelerometer =
    _accelerometerValues?.map((double v) => v.toStringAsFixed(1))?.toList();
    final List<String> gyroscope =
    _gyroscopeValues?.map((double v) => v.toStringAsFixed(1))?.toList();
    final List<String> userAccelerometer = _userAccelerometerValues
        ?.map((double v) => v.toStringAsFixed(1))
        ?.toList();

    return Scaffold(
        appBar: AppBar(
          backgroundColor: Colors.blue[800],
            title: Text('Sensors')),
        body: Column(
          crossAxisAlignment: CrossAxisAlignment.center,
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text('Accelerometer: $accelerometer'),
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text('UserAccelerometer: $userAccelerometer'),
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text('Gyroscope: $gyroscope'),
            ),
          ],
        ));
  }
}