http://www.eoeandroid.com/thread-333220-1-1.html
https://www.google.com/#q=LinkedList%E7%94%A8%E6%B3%95
http://blog.csdn.net/i_lovefish/article/details/8042883
http://blog.csdn.net/h11h03/article/details/3157968
http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
