What is the Dart equivalent of Java byte[]

Dart has a dart:typed_data core library exactly for this purpose:

https://api.dartlang.org/stable/1.24.3/dart-typed_data/dart-typed_data-library.html

I'm not 100% sure of how this maps to the Flutter plugin model, though I suspect a Flutter user or developer can fill us in :)

Here is the standard type mapping for platform channels:

https://flutter.io/platform-channels/#codec

On Android, byte[] maps to Uint8List.