如何在本地 Storage/External Flutter 中创建文件夹？

Question

   import 'package:path_provider/path_provider.dart';
   import 'dart:io';
   void createAppFolder() async {
       final directory = await getExternalStorageDirectory();
       final dirPath = '${directory.path}/some_name' ;
       await new Directory(dirPath).create();
    }

这是我尝试过的当然我设置了写入存储的权限但是这段代码在这个路径上创建了一个目录/storage/emulated/0/Android/data/com.example.test_app/files/some_name 我需要的是在这条道路上创建 /storage/emulated/0/some_name 知道我做错了什么或者他们是另一种方式来做到这一点 ??

Answer 1

根据插件代码，getExternalStorageDirectory() 函数采用 StorageDirectory 类型的可选参数。您可以尝试提供类型参数。可用类型有：

enum StorageDirectory {
  /// Contains audio files that should be treated as music.
  ///
  /// See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_MUSIC.
  music,

  /// Contains audio files that should be treated as podcasts.
  ///
  /// See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_PODCASTS.
  podcasts,

  /// Contains audio files that should be treated as ringtones.
  ///
  /// See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_RINGTONES.
  ringtones,

  /// Contains audio files that should be treated as alarm sounds.
  ///
  /// See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_ALARMS.
  alarms,

  /// Contains audio files that should be treated as notification sounds.
  ///
  /// See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_NOTIFICATIONS.
  notifications,

  /// Contains images. See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_PICTURES.
  pictures,

  /// Contains movies. See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_MOVIES.
  movies,

  /// Contains files of any type that have been downloaded by the user.
  ///
  /// See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_DOWNLOADS.
  downloads,

  /// Used to hold both pictures and videos when the device filesystem is
  /// treated like a camera's.
  ///
  /// See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_DCIM.
  dcim,

  /// Holds user-created documents. See https://developer.android.com/reference/android/os/Environment.html#DIRECTORY_DOCUMENTS.
  documents,
}

更多详情请参考this code 如果您的问题仍未解决，您可以向插件作者提出请求。

希望对您有所帮助。

Answer 2

如果你想在 /storage/emulated/0 中创建目录，试试这个。

import 'dart:io';
 _createFolder()async{
final folderName="some_name";
final path= Directory("storage/emulated/0/$folderName");
if ((await path.exists())){
  // TODO:
  print("exist");
}else{
  // TODO:
  print("not exist");
  path.create();
}

}

Answer 3

对我来说这很有效
permission_handler

但首先在您的 Android 清单

中设置权限

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

Future<String> createFolder(String cow) async {
  final folderName = cow;
  final path = Directory("storage/emulated/0/$folderName");
  var status = await Permission.storage.status;
  if (!status.isGranted) {
    await Permission.storage.request();
  }
  if ((await path.exists())) {
    return path.path;
  } else {
    path.create();
    return path.path;
  }
}

或 IOS 和 Android（最佳）

  Future<String> createFolder(String cow) async {
 final dir = Directory((Platform.isAndroid
            ? await getExternalStorageDirectory() //FOR ANDROID
            : await getApplicationSupportDirectory() //FOR IOS
        )!
        .path + '/$cow');
    var status = await Permission.storage.status;
    if (!status.isGranted) {
      await Permission.storage.request();
    }
    if ((await dir.exists())) {
      return dir.path;
    } else {
      dir.create();
      return dir.path;
    }
  }

注意：
如果您命名 createFolder(".folder")，该文件夹将被隐藏。
如果您在文件夹中创建 .nomedia 文件，其他应用将无法扫描您的文件夹。

如何在本地 Storage/External Flutter 中创建文件夹？

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