为什么地理位置无法在带有React Native的Android模拟器上运行？

Question

I'm trying to get the current user location in Android with React Native. I have written the following snippet in the App.js file:

import React, { Component } from "react";
import {
  Platform,
  StyleSheet,
  Text,
  View,
  Alert,
  TouchableOpacity
} from "react-native";

export default class App extends Component {
  state = {
    location: null
  };

  findCoordinates = () => {
    navigator.geolocation.getCurrentPosition(
      position => {
        const location = JSON.stringify(position);

        this.setState({ location });
      },
      error => alert(error.message),
      { enableHighAccuracy: true, timeout: 20000, maximumAge: 1000 }
    );

    alert("SKIPPED");
  };

  render() {
    return (
      <View style={styles.container}>
        <TouchableOpacity onPress={this.findCoordinates}>
          <Text style={styles.welcome}>Find My Coords?</Text>
          <Text>Location: {this.state.location}</Text>
        </TouchableOpacity>
      </View>
    );
  }
}


const styles = StyleSheet.create({
  ... some style ...
});

Since I use an Android emulator, I have also added the following line in the AndroidManifest.xml file located in android\\app\\src\\main , just above the application tag:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

When I run it, no request for sharing the GPS location pops up and also the getCurrentPosition function seems to be just skipped. The state is not updated, no error is displayed and the alert "SKIPPED" appears.

That is what I see on the screen after the "SKIPPED" alert is dismissed:

What am I missing here?

Answer 1

IOS

If you are using Simulator for iOS, go to Simulator's menu bar and select Debug ‣ Location ‣ Custom Location. Enter A Coord for latitude and longitude.

Android

If you are using an Android virtual device, click the three dots, representing Extended controls, on the toolbar in the emulator. In the Location section, Enter A Coord for latitude and longitude.

Answer 2

Apparently I had to restart my emulator and then it started working correctly. Found a hint here .