how to rename file in flutter
import 'package:path_provider/path_provider.dart';
...
...
PickedFile pickedFile = await _picker.getImage(source: ImageSource.camera);
// Save and Rename file to App directory
String dir = (await getApplicationDocumentsDirectory()).path;
String newPath = path.join(dir, 'case01wd03id01.jpg');
File f = await File(pickedF.path).copy(newPath);