CODEWITHSUNDEEP
flutterdownloaddio
Artur Uvarov
Artur Uvarov

Reputation: 95

Unhandled Exception: FileSystemException: Cannot open file, path ... (OS Error: No such file or directory, errno = 2)

I'm trying to download *.xlsx file using dio.download, and it's throwing the errors: Unhandled Exception: FileSystemException: Cannot open file, path = '/storage/emulated/0/Android/data/com.example.foodagator_app/files/file.xlsx' (OS Error: No such file or directory, errno = 2)

Another one error from try/catch block: FileSystemException: Creation failed, path = 'File: '' (OS Error: Read-only file system, errno = 30)

I wrote the permission in androidmanifest for external storage, and also tried temporary directory, but it's not working. Can anyone help me with this? Here is my code

void download() async {
    var tempDir = await getExternalStorageDirectory();
    File file = File(tempDir!.path + '/file.xlsx');
    try {
      Response response = await dio.download(
        url,
        file,
        options: Options(
          responseType: ResponseType.bytes,
          followRedirects: false,
        ),
      );

      var raf = file.openSync(mode: FileMode.write);
      // response.data is List<int> type
      raf.writeFromSync(response.data);
      await raf.close();
    } catch (e) {
      print('Error is: $e');
    }
  }

  void readFile() async {
    var tempDir = await getExternalStorageDirectory();

    var filePath = tempDir!.path + "/file.xlsx";
    var bytes = File(filePath).readAsBytesSync();
    var decoder = SpreadsheetDecoder.decodeBytes(bytes, update: true);
    for (var table in decoder.tables.keys) {
      print(table);
      print(decoder.tables[table]!.maxCols);
      print(decoder.tables[table]!.maxRows);
      for (var row in decoder.tables[table]!.rows) {
        print('$row');
      }
    }
  }

Upvotes: 5

Views: 39291

Answers (5)

Virag
Virag

Reputation: 11

For Flutter use

final directory = await getApplicationDocumentsDirectory();

await Hive.initFlutter(directory.path);

Of course, you need to

import 'package:path_provider/path_provider.dart';

WidgetsFlutterBinding.ensureInitialized();    
final directory = await getApplicationDocumentsDirectory();
Hive.init(directory.path);

Upvotes: 1

Shahan Ahmed
Shahan Ahmed

Reputation: 41

You could make a custom name as well.

String createDownloadDocName(){
    return'${fileName}-${DateTime.now().microsecond}';
  }

Upvotes: -1

Mosayeb Masoumi
Mosayeb Masoumi

Reputation: 583

in android 11 and higher use below permission, without tools:ignore="ScopedStorage"

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

Upvotes: 1

kahan x10
kahan x10

Reputation: 285

In my case, it was caused because I had moved a dart file to another folder but my other files were still referencing that file using the old path, you can import the file again using the new path and using the "package:" keyword to solve this error.

Moral: Don't use relative paths to import a file anywhere in your project, always use the "package:" scheme.

Upvotes: 1

Ahmad hassan
Ahmad hassan

Reputation: 1009

This error is getting because there is no file named file.xlsx you can check if file exists or not

if(file.existsSync())

if file does not exist, you can create one using,

new File('$path/file.xlsx').create(recursive: true);

Upvotes: 4

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