重写 onTrackingEvent获取TrackingValues集合,然后通过TrackingValues的state属性的isTrackingState()方法判断是否为追踪状态,或者直接使用state状态来判断. state状态枚举: public enum TrackingState { Unknown = , NotTracking = , Tracking = , Lost = , Found = , Extrapolated = , Initialized = , Registe