flutter - 在 list 中找不到 : []22 - Flutter 的权限

Question

我正在尝试从用户那里获得存储许可。下面是示例(复制粘贴)代码。但是当我尝试请求权限时出现错误。

D/permissions_handler(12775): No permissions found in manifest for: []22

代码

import 'package:duplicate_file_remover/globals.dart' as globals;
import 'package:duplicate_file_remover/ui/views/homeViews/homeView.dart';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:permission_handler/permission_handler.dart';

class MainDataProvider extends StatefulWidget {
  const MainDataProvider({Key? key}) : super(key: key);

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

class _MainDataProviderState extends State<MainDataProvider> {

  PermissionStatus _permissionStatus = PermissionStatus.denied;

  Future<void> _askStoragePermission() async {
    debugPrint(" ---------------- Asking for permission...");
    await Permission.manageExternalStorage.request();
    if (await Permission.manageExternalStorage.request().isGranted) {
      PermissionStatus permissionStatus =
          await Permission.manageExternalStorage.status;
      setState(() {
        _permissionStatus = permissionStatus;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: TextButton(
          onPressed: () async {
            await _askStoragePermission();

            if (_permissionStatus.isGranted) {
              debugPrint(" ---------------- Permission allowed");
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => HomeView(),
                ),
              );
            } else {
              // openAppSettings();
              debugPrint(" --------------------- Permission denied");
            }
          },
          child: const Text("Get permission"),
        ),
      ),
    );
  }
}

我正在使用 permission_handler ( https://pub.dev/packages/permission_handler ) 包。

我试过了 this solutions但它不起作用。

Answer 1

检查 build.gradle 文件中的 targetSdkVersion。

如果您使用的是 Android 11(targetSdkVersion = 30)，则需要在 manifest 中以不同方式编写此权限。您可以尝试 this post 中讨论的解决方案