public interface DragAndSwipeDataCallback
由外部实现的数据操作
abstract Unit
dataMove(Integer fromPosition, Integer toPosition)
dataRemoveAt(Integer position)
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
abstract Unit dataMove(Integer fromPosition, Integer toPosition)
item 数据交换
abstract Unit dataRemoveAt(Integer position)
删除 Item 数据