如何在保存到下载文件夹之前将标题赋予pdf文件？

Question

I want exactly this page in flutter

Answer 1

I'm not sure where that screen is coming from. But you can try the file_picker_writable plugin. (shameless plug).

  Future<void> _openFilePickerForCreate() async {
    final rand = Random().nextInt(10000000);
    final fileInfo = await FilePickerWritable().openFileForCreate(
      fileName: 'newfile.$rand.codeux',
      writer: (file) async {
        final content = 'File created at ${DateTime.now()}\n\n';
        await file.writeAsString(content);
      },
    );
    if (fileInfo == null) {
      _logger.info('User canceled.');
      return;
    }
    final data = await _appDataBloc.store.load();
    await _appDataBloc.store
        .save(data.copyWith(files: data.files + [fileInfo]));
  }
}

this will open a folder chooser dialog for the user and a default file name (given by fileName ).

This code example will open the following dialog: