Saving Data in Flutter

Jan 31 2024 · Dart 3, Flutter 3.10, Visual Studio Code

Part 3: Reading & Writing Files

11. Storing a Text File

Episode complete

Play next episode

Next
About this episode
Leave a rating/review
See forum comments
Cinema mode Mark complete Download course materials
Previous episode: 10. Use path & path_provider Next episode: 12. Creating the File List Screen (Part 1)

Get immediate access to this and 4,000+ other videos and books.

Take your career further with a Kodeco Personal Plan. With unlimited access to over 40+ books and 4,000+ professional videos in a single subscription, it's simply the best investment you can make in your development career.

Learn more Already a subscriber? Sign in.

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

After adding path and path_provider to our project, we are now ready to write our first file to the app. Like we did with SharedPreferences and FlutterSecureStorage, we’ll begin by creating a helper file that will deal with the reading and writing actions for our files.
So in the lib folder of your project, create a new file, and call it file_helper.dart.

Future<String> get _path async { 
    final directory = await getApplicationDocumentsDirectory(); 
    return directory.path; 
  } 
Future<File> getFile(String fileName) async { 
    final path = await _path; 
    return File(p.join(path, fileName)); 
  } 
  Future<File> writeFile(String fileName, String content) async { 
    final localFile = await getFile(fileName); 
    return localFile.writeAsString(content); 
  } 
Future<String> readFile(String fileName) async { 
    try { 
      final localFile = await getFile(fileName); 
      return await localFile.readAsString(); 
    } catch (e) { 
      print('Error reading file: $e'); 
return ''; 
    } 
  }