import 'package:flutter_bmflocation/bdmap_location_flutter_plugin.dart';

final LocationFlutterPlugin _myLocPlugin = LocationFlutterPlugin();

_myLocPlugin.updateHeadingCallback(callback: (BaiduHeading result) {
  /// to do something
});

_suc = await _myLocPlugin. startUpdatingHeading();

_suc = await _myLocPlugin. stopUpdatingHeading ();