[ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: HiveError: Cannot write, unknown type: _File. Did you forget to register an adapter?

when I tried to add a video file I'm getting this error

[ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: HiveError: Cannot write, unknown type: _File. Did you forget to register an adapter?

**Code sample**
model.dart

@HiveType(typeId: 1)
class Video {
@HiveField(0)
int? id;

@HiveField(1)
final File videoFile;

Video({required this.videoFile, this.id});
}

model.g.dart

class VideoAdapter extends TypeAdapter {
@override
final int typeId = 1;

@override
Video read(BinaryReader reader) {
final numOfFields = reader.readByte();
final fields = {
for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
};
return Video(
videoFile: fields[0] as File,
);
}

@override
void write(BinaryWriter writer, Video obj) {
writer
..writeByte(1)
..writeByte(0)
..write(obj.videoFile);
}

@override
int get hashCode => typeId.hashCode;

@override
bool operator ==(Object other) =>
identical(this, other) ||
other is VideoAdapter &&
runtimeType == other.runtimeType &&
typeId == other.typeId;
}

Future main() async {
WidgetsFlutterBinding.ensureInitialized();
await Hive.initFlutter();
if (!Hive.isAdapterRegistered(VideoAdapter().typeId)) {
Hive.registerAdapter(VideoAdapter());
}
runApp(const MyApp());
}

DB code

Future addVideos(Video value) async {
final videoDB = await Hive.openBox('video_db');
await videoDB.add(value);
videosNotifier.value.add(value);
videosNotifier.notifyListeners();
}

Future onCamaraClick() async {
final capture = await ImagePicker().pickVideo(source: ImageSource.camera);
final file = File(capture!.path);
if (file == null) {
return;
} else {
setState(() {
final videoToAddList = Video(videoFile: file);
addVideos(videoToAddList);
});
}
}

**Version**
- Platform:
-
- Android,

- Flutter version: [e.g. 1.5.4]
-
Flutter: 2.8.0

- Hive version: [e.g. 0.5.0]
-
hive: ^2.0.4
hive_flutter: ^1.1.0

Start with model.dart and the generated model.g.dart adapter, then trace registration in main and persistence through addVideos and onCamaraClick. Reproduce the reported error when adding a video and determine the expected supported representation for the File field. Done means the Video record can be persisted without the unknown-type error and the behavior is verified against this example.

Written by the indexing model from the issue text.