Do a login registration interface:
Requirements:
A. as long as the realistic user name and password (username with Numbers)
B. after registration data stored in the local database;
C. after the login is a buddy list; (with image and name: cao cao, guan yu, zhang fei, liu bei)
D. long press friends can view the details (display image and name)
E. add friends on the upper right corner of the menu, click to jump to another page (not write)