实现长按Gridview的item，可以拖动item，移动到别的item位置时，其它item自动移位.类似小米launcher功能-According to the GridView, you can drag the item to move to another item position to achieve long, the other item automatically shift

实现3位数码管移位，ls164的用法和编译-To achieve three digital tube shift, ls164 usage and compilation