flutter 权限申请

Posted 2022-11-12 loaderman

添加依赖

  permission_handler: ^3.2.2

androidmanifest.xml添加对应的用户权限

在flutter 中app入口申请权限：

import ‘package:flutter/material.dart‘;
import ‘package:flutter/services.dart‘;
import ‘package:permission_handler/permission_handler.dart‘;



import ‘users.dart‘;



Future main() async 
  if (!await _requestPermissions()) 

    await AppUtils.popApp();
   else 
    runApp(new MyApp());
  



class MyApp extends StatelessWidget 

  @override
  Widget build(BuildContext context) 
    final appTitle = "flutter demo";
    return new MaterialApp(
      title: appTitle,
      home: new JobPage(),
    );
  



Future<bool> _requestPermissions() async 
  Map<PermissionGroup, PermissionStatus> permissions =
      await PermissionHandler().requestPermissions([
    PermissionGroup.storage,
    PermissionGroup.location,
  ]);


  List<bool> results = permissions.values.toList().map((status) 
    return status == PermissionStatus.granted;
  ).toList();


  return !results.contains(false);


class AppUtils 
  static Future<void> popApp() async 
    await SystemChannels.platform.invokeMethod(‘SystemNavigator.pop‘);
  

  static Future checkUpgrade() async 
    try 
      final bool result =
      await ApplicationMethodChannel.main.invokeMethod(‘checkUpgrade‘);
      print(‘result=$result‘);
     on PlatformException 
      print(‘faied‘);
    
  

class ApplicationMethodChannel 
  static MethodChannel main = MethodChannel(‘main‘);