LruCache
https://www.cnblogs.com/huhx/p/useLruCache.html
LruCache & DiskLruCache
https://blog.csdn.net/pgg_cold/article/details/79457987
立个Flag,有空写一下;
https://www.cnblogs.com/huhx/p/useLruCache.html
https://blog.csdn.net/pgg_cold/article/details/79457987
立个Flag,有空写一下;