permission_handler 사용법

권한 요청에 사용되는 패키지

pub.dev/packages/permission_handler

permission_handler | Flutter Package

 

 

1. 권한확인

  Future<bool>_checkPermission() async {
    var status = await Permission.storage.status;
    return status == PermissionStatus.granted ? true : false;
  }

2. 권한요청

  Future<bool> _requestPermission() async {
    Map<Permission, PermissionStatus> statues =await [Permission.storage].request();
    return statues[Permission.storage] == PermissionStatus.granted ? true : false;
  }

3. 사용

여러가지 방법이 있을 수 있습니다.

  @override
  void initState() {
    super.initState();

    _checkPermission()
      .then((value){
        if(value == false){
          return _requestPermission();
        }
      })
      .then((value){
        print(value);
      });
  }

 

[전체 소스]

import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  bool _storagePermission = false;


  Future<bool>_checkPermission() async {
     var status = await Permission.storage.status;

     print(status);
     if(status == PermissionStatus.granted){
       return true;
     }else{
       return false;
     }
  }

  Future<bool> _requestPermission() async {

    //여러개
    Map<Permission, PermissionStatus> statues =await [Permission.storage].request();

    print(statues[Permission.storage]);

    if(statues[Permission.storage] == PermissionStatus.granted){
      return true;
    }else{
      return false;
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title:Text("appbar"),
        actions: [
          IconButton(
              onPressed: () async{
                var hasOpened = openAppSettings();
                debugPrint("App Settings opend : "+hasOpened.toString());
              },
              icon: const Icon(Icons.settings))
        ],

      ),
      body: Center(
        child: Column(
          children: [
            Text('Storage permission : $_storagePermission'),
            ElevatedButton(onPressed: () async {
              var result= await _checkPermission();
              setState(() {
                _storagePermission = result;
              });
            }, child: Text("권한확인")),
            ElevatedButton(onPressed: () async {
              var result = await _requestPermission();
              setState(() {
                _storagePermission = result;
              });
            }, child:Text("권한요청"))
          ],
        ),
      ),
    );
  }
}