相机工作状态枚举类

class WorkState

描述：相机工作状态枚举定义

public enum WorkState {
   //空闲状态
   IDLE("idle", "Idle"),
   //拍照
   CAPTURE("capture", "TakingPhoto"),
   //录像
   RECORD("record", "Recording"),
   //录像过程中拍照
   RECORD_PHOTO_TAKING("record_taking", "Recording_taking"),
   //未知状态
   UNKNOWN("unknown", "unknown");
}

描述：相机工作状态枚举类。