Flutter: Get the filename of a File

Question

I thought this would be pretty straight-forward, but can't seem to get this. I have a File file and it has a path file.path which spits out something like /storage/emulated/0/Android/data/my_app/files/Pictures/ca04f332.png but I can't seem to find anything to get just ca04f332.png.

Every answer I could find anywhere, is some variation of parsing the full path. This is brutally inefficient, and it matters a lot if you are going to walk a large and deep tree of files, for example to find a filename that matches a certain regex. Even Python would be faster at this. Really? We must parse the whole path? — freeideas, Jul 20 '22 at 20:31

score 167 · Accepted Answer · edited Sep 25 '20 at 14:20

167

You can use the basename function from the dart path library:

import 'package:path/path.dart';

File file = new File("/dir1/dir2/file.ext");
String basename = basename(file.path);
# file.ext

edited Sep 25 '20 at 14:20

Ely Dantas

705
11
23

answered May 20 '18 at 22:31

jspcal

50,847
7
72
76

7

Don't forgot to import path.dart => import 'package:path/path.dart'; – Abhishek Kumar Apr 05 '20 at 19:04
under some reasons am getting a file name without extension, so how can i get the file extension. /storage/emulated/0/Android/data/my_app/files/Pictures/ca04f332 – b.john Apr 19 '20 at 13:30
3

or can use the basename function without extension: `String basename = basenameWithoutExtension(file.path);` – loonix Jul 10 '20 at 07:52
1

@b.john get the path `String path = file.path;` and file name with extension `fileName = path.split('/').last;` – Abdul Qadir Aug 26 '21 at 09:08
Just a note to my issue, If you use **BLoC** and using `part` and `part of` for file organizer, adding `import 'package:path/path.dart';` will gave error to the `context.read().yourMethod();` code line – Muhammad Faisal Jan 18 '23 at 03:53
recommended because path is different in cross platform – Jetwiz Mar 18 '23 at 08:18

score 70 · Answer 2 · answered Jan 25 '20 at 15:49

70

File file = new File("/storage/emulated/0/Android/data/my_app/files/Pictures/ca04f332.png"); 
String fileName = file.path.split('/').last;

print(fileName);

output = ca04f332.png

answered Jan 25 '20 at 15:49

0917237

861
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simple and effective and also supports http path which is another +1 – Ali80 Feb 05 '21 at 10:07
9

You should replace '/' with `Platform.pathSeparator` – Pierre Monier Mar 16 '22 at 18:31

score 11 · Answer 3 · edited Jun 19 '23 at 08:15

11

Since Dart Version 2.6 has been announced and it's available for flutter version 1.12 and higher, You can use extension methods. It will provide a more readable and global solution to this problem.

file_extensions.dart :

import 'dart:io';

extension FileExtention on FileSystemEntity{
  String get name {
    return this?.path?.split(Platform.pathSeparator)?.last;
  }
}

and name getter is added to all the file objects. You can simply just call name on any file.

main() {
  File file = new File("/dev/dart/work/hello/app.dart");
  print(file.name);
}

Read the document for more information.

Note: Since extension is a new feature, it's not fully integrated into IDEs yet and it may not be recognized automatically. You have to import your extension manually wherever you need that. Just make sure the extension file is imported:

import 'package:<your_extention_path>/file_extentions.dart';

edited Jun 19 '23 at 08:15

Community

1
1

answered Dec 14 '19 at 15:37

Saman Salehi

1,995
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For the sake of total completeness, should the this?.path?.split(...) call be modified to use pathSeparator in cases of running on Windows? Or does Dart / Flutter always work with a "/" character at the language level? (I think Java does that, too). – ChrisH Jul 27 '20 at 23:00
2

@ChrisH Actually by the time that I wrote this answer, I didn't know that `Platform.pathSeparator` is exist. Yes, It would be a better approach if you use `Platform.pathSeparator` instead of `'/'` – Saman Salehi Jul 28 '20 at 13:04
@ChrisH feel free to suggest an edit on my answer and I will accept it – Saman Salehi Jul 28 '20 at 13:09
if anyone want to do it on `filePath` as a `String` then use this `extension FileExtention on String { String get name { return this?.split("/")?.last; } } ` – hewa jalal Apr 09 '21 at 09:05

score 5 · Answer 4 · answered Nov 02 '22 at 09:27

Direct way:

File file = File('/foo/bar/baz/my_image.jpg');
String fileName = file.path.split(Platform.pathSeparator).last; // my_image.jpg

Using an extension:

1. Create an extension:

extension FileEx on File {
  String get name => path.split(Platform.pathSeparator).last;
}

2. Usage:

File file = File('/foo/bar/baz/my_image.jpg');
String fileName = file.name; // my_image.jpg

score 1 · Answer 5 · answered Jul 11 '21 at 15:55

1

Easy way to get name or any other file handling operations.I recommend to use this plugin : https://pub.dev/packages/file_support

main() {
  String filename= FileSupport().getFileNameWithoutExtension(<File Object>);
}

answered Jul 11 '21 at 15:55

Parmeet Singh

21
1
1

score 0 · Answer 6 · answered Nov 30 '22 at 07:35

You cane use extension method No need to use any package

Create Method like this

extension FileNameExtension on File {
  String getFileName() {
    String fileName = path.split('/').last;
    return fileName;
  }
}

implement

File file = File("yourpath/example.pdf");
file.getFileName() // result =>  example.pdf

Flutter: Get the filename of a File

6 Answers6

Direct way:

Using an extension: