public interface DragAndSwipeDataCallback
abstract Unit
dataSwap(Integer fromPosition, Integer toPosition)
dataRemoveAt(Integer position)
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
abstract Unit dataSwap(Integer fromPosition, Integer toPosition)
item 数据交换
abstract Unit dataRemoveAt(Integer position)
删除 Item 数据