Question

我一直在尝试将React Native的GeoLocalisation用于Android应用程序。文档记录不佳的模块可在https://facebook.github.io/react-native/docs/geolocation.html找到。根据文档，您使用AndroidManifest.xml文件中的以下代码处理Android上的位置权限

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

但是，我的在线研究表明上述代码行对于ANDROID＆gt; = 6.0

的版本没用

由于我的GeoLocation实现目前无效，我没有其他理由，只能相信未正确处理位置权限。

如何在运行时为React Native Android App成功请求位置权限？提前谢谢！

Answer 1

这对我不起作用

if (granted === PermissionsAndroid.RESULTS.GRANTED) {
}

我提到https://facebook.github.io/react-native/docs/permissionsandroid.html#request 和check（）返回一个布尔值

const granted = await PermissionsAndroid.check( PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION );

if (granted) {
  console.log( "You can use the ACCESS_FINE_LOCATION" )
} 
else {
  console.log( "ACCESS_FINE_LOCATION permission denied" )
}

Answer 2

我通过在android / app / build.gradle中更改了targetSdkVersion（与compileSdkVersion相同，在我的情况下为23）来解决了这个问题。

编辑位于android / src / main中的AndroidManifest.xml并添加

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

//下一个：

 import { PermissionsAndroid } from 'react-native';

//，然后添加此方法：

export async function requestLocationPermission() 
{
  try {
    const granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
      {
        'title': 'Example App',
        'message': 'Example App access to your location '
      }
    )
    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      console.log("You can use the location")
      alert("You can use the location");
    } else {
      console.log("location permission denied")
      alert("Location permission denied");
    }
  } catch (err) {
    console.warn(err)
  }
}

//，并在运行时请求位置时访问该方法

   async componentWillMount() {
    await requestLocationPermission()
    }

Answer 3

您可以使用react本机PermissionsAndroid来请求权限：https://facebook.github.io/react-native/docs/permissionsandroid.html#request

或者，更简单的选择是使用为您执行此操作的库，例如https://github.com/yonahforst/react-native-permissions

Answer 4

这是我的代码，可同时获得Android和IOS中的当前位置

对于Android ：

您需要在android AndroidManifest.xml文件中添加以下权限

对于IOS 您需要在Info.plist中包括NSLocationWhenInUseUsageDescription键，才能在使用应用程序时启用地理定位。当您创建带有react-native init的项目时，默认情况下会启用地理定位。

以下是查找当前位置（纬度和经度）的代码：


//This is an example code to get Geolocation// 

import React from 'react';
//import react in our code. 

import {View, Text,  StyleSheet, Image ,PermissionsAndroid,Platform} from 'react-native';
//import all the components we are going to use.

export default class App extends React.Component {
    state = {
        currentLongitude: 'unknown',//Initial Longitude
        currentLatitude: 'unknown',//Initial Latitude
    }
    componentDidMount = () => {
        var that =this;
        //Checking for the permission just after component loaded
        if(Platform.OS === 'ios'){
            this.callLocation(that);
        }else{
            async function requestCameraPermission() {
                try {
                    const granted = await PermissionsAndroid.request(
                        PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,{
                            'title': 'Location Access Required',
                            'message': 'This App needs to Access your location'
                        }
                    )
                    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
                        //To Check, If Permission is granted
                        that.callLocation(that);
                    } else {
                        alert("Permission Denied");
                    }
                } catch (err) {
                    alert("err",err);
                    console.warn(err)
                }
            }
            requestCameraPermission();
        }    
    }
    callLocation(that){
        //alert("callLocation Called");
        navigator.geolocation.getCurrentPosition(
            //Will give you the current location
            (position) => {
                const currentLongitude = JSON.stringify(position.coords.longitude);
                //getting the Longitude from the location json
                const currentLatitude = JSON.stringify(position.coords.latitude);
                //getting the Latitude from the location json
                that.setState({ currentLongitude:currentLongitude });
                //Setting state Longitude to re re-render the Longitude Text
                that.setState({ currentLatitude:currentLatitude });
                //Setting state Latitude to re re-render the Longitude Text
            },
            (error) => alert(error.message),
            { enableHighAccuracy: true, timeout: 20000, maximumAge: 1000 }
        );
        that.watchID = navigator.geolocation.watchPosition((position) => {
            //Will give you the location on location change
            console.log(position);
            const currentLongitude = JSON.stringify(position.coords.longitude);
            //getting the Longitude from the location json
            const currentLatitude = JSON.stringify(position.coords.latitude);
            //getting the Latitude from the location json
            that.setState({ currentLongitude:currentLongitude });
            //Setting state Longitude to re re-render the Longitude Text
            that.setState({ currentLatitude:currentLatitude });
            //Setting state Latitude to re re-render the Longitude Text
        });
    }
    componentWillUnmount = () => {
        navigator.geolocation.clearWatch(this.watchID);
    }
    render() {
        return (
            <View style = {styles.container}>
                <Image
                    source={{uri:'https://png.icons8.com/dusk/100/000000/compass.png'}}
                    style={{width: 100, height: 100}}
                />
                <Text style = {styles.boldText}>
                    You are Here
                </Text>
                <Text style={{justifyContent:'center',alignItems: 'center',marginTop:16}}>
                    Longitude: {this.state.currentLongitude}
                </Text>
                <Text style={{justifyContent:'center',alignItems: 'center',marginTop:16}}>
                    Latitude: {this.state.currentLatitude}
                </Text>
            </View>
        )
    }
}

const styles = StyleSheet.create ({
    container: {
        flex: 1,
        alignItems: 'center',
        justifyContent:'center',
        marginTop: 50,
        padding:16,
        backgroundColor:'white'
    },
    boldText: {
        fontSize: 30,
        color: 'red',
    }
})

Answer 5

您可以使用以下代码来请求位置许可

try {
     const granted = await PermissionsAndroid.request(
       PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION
     )
     if (granted === PermissionsAndroid.RESULTS.GRANTED) {
       alert("You can use the location")
     } else {
       alert("Location permission denied")
     }
   } catch (err) {
     console.warn(err)
   }
   alert('hi');

Answer 6

我注意到两件事：

您必须更改compileSdkVersion 23档案中的build.gradle
您必须添加视图的点击监听器才能显示权限对话框。

示例代码：

import React, { Component } from 'react';
import { Text, PermissionsAndroid, Alert } from 'react-native';

export default class RuntimePermissionSample extends React.Component {

    constructor(props) {
        super(props);
    }

    async requestLocationPermission() {
        const chckLocationPermission = PermissionsAndroid.check(PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION);
        if (chckLocationPermission === PermissionsAndroid.RESULTS.GRANTED) {
            alert("You've access for the location");
        } else {
            try {
                const granted = await PermissionsAndroid.request(PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
                    {
                        'title': 'Cool Location App required Location permission',
                        'message': 'We required Location permission in order to get device location ' +
                            'Please grant us.'
                    }
                )
                if (granted === PermissionsAndroid.RESULTS.GRANTED) {
                    alert("You've access for the location");
                } else {
                    alert("You don't have access for the location");
                }
            } catch (err) {
                alert(err)
            }
        }
    };

    render() {
        return (
            <Text
                onPress={() => this.requestLocationPermission()}>
                Request Location Permission
            </Text>
        )
    }
}

希望这会对你有所帮助。

Answer 7

这对我有用

 async requestCameraPermission() {
try {
  const granted = await PermissionsAndroid.request(
    PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION
  )
  if (granted === PermissionsAndroid.RESULTS.GRANTED) {
    this.props.navigation.navigate("MapScreen")
  } else {
    alert("Camera permission denied")
  }
} catch (err) {
  console.warn(err)
  }
}

Answer 8

在清单中

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

more details

import {PermissionsAndroid} from 'react-native';

async function requestCameraPermission() {
  try {
    const granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.CAMERA,
      {
        title: 'Cool Photo App Camera Permission',
        message:
          'Cool Photo App needs access to your camera ' +
          'so you can take awesome pictures.',
        buttonNeutral: 'Ask Me Later',
        buttonNegative: 'Cancel',
        buttonPositive: 'OK',
      },
    );
    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      console.log('You can use the camera');
    } else {
      console.log('Camera permission denied');
    }
  } catch (err) {
    console.warn(err);
  }
}

export default class AlertDetails extends Component{

    async componentDidMount() {
        await request_storage_runtime_permission()
    }
}

如何在运行时请求React Native中的Android设备位置权限？

8 个答案: