如何使用React-Native-Maps获取当前位置

我不确定，但是有一个问题（" geolocation Time of Out，code 3"），看起来相关

对于其他任何在Android上挣扎的人，请尝试删除 最大值：2000选项参数。这个选项引起了 地理位置到超时或崩溃应用程序。

import React, {useState, useEffect} from 'react';
import {StyleSheet, Text} from 'react-native';
import MapView, {Marker} from 'react-native-maps';
import Geolocation from '@react-native-community/geolocation';
const App = () => {
  const [position, setPosition] = useState({
    latitude: 10,
    longitude: 10,
    latitudeDelta: 0.001,
    longitudeDelta: 0.001,
  });
  useEffect(() => {
    Geolocation.getCurrentPosition((pos) => {
      const crd = pos.coords;
      setPosition({
        latitude: crd.latitude,
        longitude: crd.longitude,
        latitudeDelta: 0.0421,
        longitudeDelta: 0.0421,
      });
    }).catch((err) => {
      console.log(err);
    });
  }, []);
  return (
    <MapView
      style={styles.map}
      initialRegion={position}
      showsUserLocation={true}
      showsMyLocationButton={true}
      followsUserLocation={true}
      showsCompass={true}
      scrollEnabled={true}
      zoomEnabled={true}
      pitchEnabled={true}
      rotateEnabled={true}>
       <Marker
       title='Yor are here'
       description='This is a description'
       coordinate={position}/>
       </MapView>
  );
};
const styles = StyleSheet.create({
  map: {
    ...StyleSheet.absoluteFillObject,
  },
});

export default App;

它在我的工作中正常工作。我做的唯一更改是在StyleSheet中。

container: {
    position: 'absolute',
    height : SCREEN_HEIGHT,
    width : SCREEN_WIDTH,
    justifyContent: 'flex-end',
    alignItems: 'center',
}

此后，它使我的位置变得如此。您可以在此之后添加标记以显示您的位置。

这对我有用。第三个选项是创建概率的方法。

navigator.geolocation.getCurrentPosition() =>{
},
 err => {
},
{ enableHighAccuracy: false, timeout: 20000}, //this worked for me

navigator.geolocation.getCurrentPosition()已弃用。
改用@react-native-community/geolocation。

npm install @react-native-community/geolocation --save

import React, { Component } from "react";
// global.currentScreenIndex = 'Dashboard';
//Import all required component
import {
  View,
  Text,
  StyleSheet,
  TouchableOpacity,
  Image,
  Modal,
  TouchableHighlight,
  StatusBar,
  FlatList,
  ActivityIndicator,
  Button,
  NetInfo,
} from "react-native";
import MapView, { Marker } from "react-native-maps";
import Geolocation from "@react-native-community/geolocation";
const MyStatusBar = ({ backgroundColor, ...props }) => (
  <View style={[styles.statusBar, { backgroundColor }]}>
    <StatusBar translucent backgroundColor={backgroundColor} {...props} />
  </View>
);
   
class Dashboard extends Component {
  constructor() {
    super();
    this.state = {
      initialPosition: {
        latitude: 0,
        longitude: 0,
        latitudeDelta: 0,
        longitudeDelta: 0,
      },
    };
  }
  componentDidMount() {
    const { navigation } = this.props;
    Geolocation.getCurrentPosition((info) => {
      let lat = info.coords.latitude;
      let long = info.coords.longitude;
      console.log(lat);
      console.log(long);
      var initialRegion = {
        latitude: lat,
        longitude: long,
        latitudeDelta: 0.0922,
        longitudeDelta: 0.0421,
      };
      this.setState({ initialPosition: initialRegion });
    });
  }
  render() {
    const { modalVisible } = this.state;
    const { navigate } = this.props.navigation;
    // const token_data = token_value();
    // console.log("token_homes_2st"+token_data);
    return (
      <View style={styles.container}>
        <MapView
          style={styles.map}
          initialRegion={this.state.initialPosition}
          showsUserLocation={true}
        />
      </View>
    );
  }
}
export default Dashboard;
const styles = StyleSheet.create({
  container: {
    justifyContent: "center",
    fontWeight: "400",
    color: "#000",
    fontFamily:
      "Inter UI,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif",
  },
  map: {
    height: 400,
    width: 400,
    justifyContent: "flex-end",
    alignItems: "center",
  },
});