如何在运行时在 React Native 中请求 Android 设备位置的权限？

Question

我一直在尝试将 React Native 的 GeoLocalisation 用于 Android 应用程序。文档不足的模块可在此处找到 https://facebook.github.io/react-native/docs/geolocation.html。 根据文档，您在 Android 上使用AndroidManifest.xml 文件中的以下代码处理位置权限

<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 >= 6.0 的版本没有用

由于我的 GeoLocation 实现当前无法正常工作，我没有其他理由相信位置权限没有得到正确处理。

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

Answer 1

我通过更改android/app/build.gradle 中的targetSdkVersion（与compileSdkVersion 相同，在我的情况下为23）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';

然后添加这个方法：

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 2

这对我不起作用

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

我提到了https://facebook.github.io/react-native/docs/permissionsandroid.html#request 并且 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 3

您可以使用 react native 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完成此任务的库，例如 https://github.com/yonahforst/react-native-permissions

Answer 4

您可以使用以下代码询问位置权限

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 5

我注意到两件事：

1. 您必须在build.gradle 文件中更改compileSdkVersion 23
2. 您必须添加您的视图的点击监听器才能显示到权限对话框。

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 6

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()
    }
}