完成数据库的初始化以及城市的选择

Change-Id: If6d966daeb74c99651c15113b6e1b92e87247e41
Merge branch 'master' of https://github.com/QQ1350995917/b-f-w

Change-Id: Ia1e1881234dad65e2c790713c9139c11dad0a69b