更新时间：2022年04月08日 

1引入包名

import 'package:flutter_bmflocation/bdmap_location_flutter_plugin.dart';

2初始化定位插件类

final LocationFlutterPlugin _myLocPlugin = LocationFlutterPlugin();

3设置设备朝向回调，获取结果

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

4开启设备朝向监听

_suc = await _myLocPlugin. startUpdatingHeading();

5停止设备朝向监听

_suc = await _myLocPlugin. stopUpdatingHeading ();