Rename a file/Image in flutter

First import the path package.

import 'package:path/path.dart' as path;

Then create a new target path to rename the file.

File picture = await ImagePicker.pickImage(
        maxWidth: 800,
        imageQuality: 10,
        source: ImageSource.camera,
        maxHeight: 800,
);
print('Original path: ${picture.path}');
String dir = path.dirname(picture.path);
String newPath = path.join(dir, 'case01wd03id01.jpg');
print('NewPath: ${newPath}');
picture.renameSync(newPath);

Manish Raj's answer isn't working for me since image_picker: ^0.6.7, they recently changed their API when getting an image or video which returns PickedFile instead of File.

The new method I used was to convert from PickedFile to File then copy it over to applications directory with a new name. This method requires path_provider.dart:

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);

I know the question states that they do not want to move it to a new folder but this was the best way I could find to make the rename work.