存储权限被拒绝

Question

我的应用程序在 Linux 上运行良好，但我在 Android 的权限系统上遇到了困难。按下按钮，我想加载从另一个程序导出的

json

文件。但是，我收到错误：

I/flutter (24500): [MethodChannelFilePicker] Platform exception: PlatformException(read_external_storage_denied, User did not allow reading external storage, null, null)
E/flutter (24500): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(read_external_storage_denied, User did not allow reading external storage, null, null)

设置

清单

我觉得我不需要所有这些权限，但我只是尝试更多权限是否可以解决我的问题。

<manifest xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- The INTERNET permission is required for development. Specifically,
         the Flutter tool needs it to communicate with the running application
         to allow setting breakpoints, to provide hot reload, etc.
    -->
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
</manifest>

授予权限的代码

Future<void> requestPermission() async {
  var status = await Permission.storage.status;
  if (!status.isGranted) {
    print("Requesting Permission");
    status = await Permission.storage.request();
    print("Again? $status");
    // You might want to check status again here and handle denied permissions accordingly
  } else {
    print("Not requesting Permission!");
  }
}

状态返回，访问被拒绝并尝试访问文件：

    Future<void> pickFile(parent) async {
      await requestPermission();
      FilePickerResult? result = await FilePicker.platform.pickFiles(
        type: FileType.custom,
        allowedExtensions: ['json'],
      );
      if (result != null) {
        String filePath = result.files.single.path!; // Assuming the file path is not null

        try {
          File file = File(filePath);
          if (await file.exists()) {
            String fileContent = await file.readAsString();
            // Parse the JSON content
            Map<String, dynamic> jsonData = jsonDecode(fileContent);
          } else {
            print('File does not exist');
          }
        } catch (e) {
          print('Error reading file: $e');
        }
      }
    }

失败：

I/flutter (24500): [MethodChannelFilePicker] Platform exception: PlatformException(read_external_storage_denied, User did not allow reading external storage, null, null)
E/flutter (24500): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(read_external_storage_denied, User did not allow reading external storage, null, null)

我尝试过的事情

我发现了多个相关问题：

• https://github.com/Baseflow/flutter-permission-handler/issues/995
• 存储权限请求在 Flutter 中不起作用
• https://github.com/Baseflow/flutter-permission-handler/issues/907

但是要求提供照片、视频或音频并不符合我的需求。 “将你的 targetSdkVersion 降级到 32”没有帮助，因为 GooglePlay 要求 >=33 （但降级到 32 确实有效）。

Answer 1

您是否尝试将其添加到应用程序标签中

android：requestLegacyExternalStorage =“true