I followed the first steps of the React Native
tutorial here:
https://facebook.github.io/react-native/docs/getting-started.html
Then I want to read information from the device sensors.
For that I also followed this tutorial:
https://medium.com/react-native-training/using-sensors-in-react-native-b194d0ad9167
and ended up with this code (just copy/pasted from there):
// Reference:// https://medium.com/react-native-training/using-sensors-in-react-native-b194d0ad9167// https://react-native-sensors.github.ioimport React, { Component } from 'react';import { StyleSheet, Text, View} from 'react-native';import { Accelerometer } from "react-native-sensors";const Value = ({name, value}) => (<View style={styles.valueContainer}><Text style={styles.valueName}>{name}:</Text><Text style={styles.valueValue}>{new String(value).substr(0, 8)}</Text></View>)export default class App extends Component { constructor(props) { super(props); new Accelerometer({ updateInterval: 400 // defaults to 100ms }) .then(observable => { observable.subscribe(({x,y,z}) => this.setState({x,y,z})); }) .catch(error => { console.log("The sensor is not available"); }); this.state = {x: 0, y: 0, z: 0}; } render() { return (<View style={styles.container}><Text style={styles.headline}> Accelerometer values</Text><Value name="x" value={this.state.x} /><Value name="y" value={this.state.y} /><Value name="z" value={this.state.z} /></View> ); }}const styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#F5FCFF', }, headline: { fontSize: 30, textAlign: 'center', margin: 10, }, valueContainer: { flexDirection: 'row', flexWrap: 'wrap', }, valueValue: { width: 200, fontSize: 20 }, valueName: { width: 50, fontSize: 20, fontWeight: 'bold' }, instructions: { textAlign: 'center', color: '#333333', marginBottom: 5, },});
Here is the full repository you can download and try right away:
$ git clone https://github.com/napolev/react-native-app$ cd react-native-app$ npm i$ expo start
My problem is that after I do: $ expo start
I get the following error:
Native modules for sensors not available. Did react-native link run successfully?
as you can see on the following image:
Any idea about how can I make this work?
Thanks!