public void moveItem(int from, int to) {
        if (mDropListener != null) {
            final int count = getInputAdapter().getCount();
            if (from >= 0 && from < count && to >= 0 && to < count) {
                mDropListener.drop(from, to);
            }
        }
    }
Move an item, bypassing the drag-sort process. Simply calls
through to {@link DropListener#drop(int, int)}.

@param from Position to move (NOTE: headers/footers ignored!
this is a position in your input ListAdapter).
@param to Target position (NOTE: headers/footers ignored!
this is a position in your input ListAdapter).
third_party/DragSortListView/src/com/mobeta/android/dslv/DragSortListView.java