location.js

componentDidMount() {
    if(Platform.OS == 'android' && Platform.Version >= 23)
      this.getInitialAndroid23Location();
  }
  
getInitialAndroid23Location = async () => {
    try {
      console.log('Asking for location permission');
      const granted = await PermissionsAndroid.request(
        PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
        {
          'title': 'Location',
          'message': 'Access to your location ' +
                    'for some reason.'
        }
      )
      if (granted === PermissionsAndroid.RESULTS.GRANTED) {
        console.log('Location granted');
        this._getInitialLocation();
      } else {
        console.log("Location permission denied")
      }
    } catch (err) {
      console.warn(err)
    }
  };