How to get the (absolute) path to the Download folder?

问题

In a Flutter project, how to get the (absolute) path to the Download folder in my Android device? My Download folder is next those one: Alarms, Android, data, DCIM, Documents, Movies, Music, Notifications, Pictures, ...

Device: GALAXY S8+ SM-G955F. Android 8.0. Not Rooted. Flutter beta v0.5.1. Dart 2.0.0-dev.58.0. Windows 10

File manager showing my Download folder

Using this package path_provider I got those 3 paths:

/data/user/0/com.exemple.fonzo/cache
/data/user/0/com.exemple.fonzo/app_flutter
/storage/emulated/0

I cannot find or access those 3 folders from Solid-Explorer file manager on my un-rooted device GALAXY S8+ SM-G955F. Android 8.0. I just want to find the absolute path to a folder (like Download) that:

I can access with my Android file manager app.
I can write files in this folder from my flutter project.

回答1:

You could use the downloads_path_provider package. You will have add <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> to your AndroidManifest.xml. Also if you plan to write into that folder and want your application to work for android version > 6 you must ask the user for writing permission. You could do that with https://pub.dev/packages/permission_handler. await PermissionHandler().requestPermissions([PermissionGroup.storage]);

回答2:

Change the function getApplicationDocumentsDirectory() to getExternalStorageDirectory() it should show the external directory for the app.

回答3:

I used this library to get public download directory in Android

ext_storage

String _getPathToDownload() async {
    return ExtStorage.getExternalStoragePublicDirectory(ExtStorage.DIRECTORY_DOWNLOADS);  print(path);  // /storage/emulated/0/Download
}

回答4:

In Flutter

https://pub.dev/packages/ext_storage

Installation Add ext_storage as a dipendency in your project pubspeck.yaml.

dependencies:
  ext_storage:

Usage First, you write import ext_storage package.

import 'package:ext_storage/ext_storage.dart';
    void dirpath() async {
      var path = await ExtStorage.getExternalStoragePublicDirectory(ExtStorage.DIRECTORY_DOWNLOADS);
    }

回答5:

You should use native feature.

At time, to access phone directory is provided by path_provider package .

With it, you can acceess: temporary directory, app directory, external storage.

Doc: https://pub.dartlang.org/packages/path_provider

来源：https://stackoverflow.com/questions/51776109/how-to-get-the-absolute-path-to-the-download-folder

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Flutter