flutter 动态申请权限

在pubspec.yaml 文件中导入

permission_handler: ^3.2.0

Android 在mainfest里添加对应权限

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

 Ios 在info.plist添加对应的权限

<key>NSCameraUsageDescription</key><string>翻呀需要您的同意才能使用相机</string>

import 'package:flutter/material.dart';import 'package:flutter/services.dart';
import 'package:permission_handler/permission_handler.dart';void main() => runApp(MyApp());class MyApp extends StatelessWidget {@overrideWidget build(BuildContext context) {// TODO: implement buildreturn MaterialApp(home: Scaffold(body: Center(child: RaisedButton(onPressed: _requestPermissions,child: Text('点击申请权限'),),),),);}
}Future<bool> _requestPermissions() async {
//  申请权限Map<PermissionGroup, PermissionStatus> permissions =await PermissionHandler().requestPermissions([PermissionGroup.storage,PermissionGroup.camera,]);
//  申请结果PermissionStatus permissionStatus =await PermissionHandler().checkPermissionStatus(PermissionGroup.camera);if (permissionStatus == PermissionStatus.granted) {print('申请成功');} else {print('申请被拒绝');bool isShow = await PermissionHandler().shouldShowRequestPermissionRationale(PermissionGroup.camera);if (!isShow) {print('当前权限已被禁用申请，请在设置中手动开启后退出重新进入程序');await PermissionHandler().openAppSettings();} else {PermissionStatus ps = await PermissionHandler().checkPermissionStatus(PermissionGroup.camera);if (ps == PermissionStatus.granted) {print('登录成功！');} else {_requestPermissions();}}}

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