问如何在Expo React Native应用程序中检查互联网连接？

EN

import React, { Component } from 'react';
import { Button, Text, View, StyleSheet, Linking } from 'react-native';

export default class App extends Component {
  state = {
    connection: false,
    url: 'https://google.com',
  };

  checkInternt = () => {
    Linking.canOpenURL(this.state.url).then(connection => {
      if (!connection) {
        this.setState({ connection: false });
      } else {
        fetch(this.state.url).then(res =>
          this.setState({ connection: res.status !== 200 ? false : true })
        );
      }
    });
  };

  componentDidMount() {
    this.checkInternt();
  }

  handlePress = () => {
    this.setState({
      url:
        this.state.url === 'https://google.com'
          ? 'http://someweirdurlthatdoesntwork.com'
          : 'https://google.com',
    });
    this.checkInternt();
  };

  render() {
    return (
      <View style={styles.container}>
        <Text>
          Connection:
          <Text style={{ color: this.state.connection ? 'green' : 'red' }}>
            {`   ${this.state.connection}`}
          </Text>
        </Text>
        <Text>{this.state.url.replace(/\https?:\/\//g, '')}</Text>
        <Button onPress={this.handlePress} title="Change server url" />
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'space-around',
    alignItems: 'center',
  },
});