我已经使用android studio向我的应用添加了登录活动但是我遇到了这些错误:
Error:(11, 37) error: cannot find symbol class GooglePlayServicesClient
Error:(13, 35) error: cannot find symbol class PlusClient
Error:(20, 44) error: package GooglePlayServicesClient does not exist
Error:(21, 33) error: package GooglePlayServicesClient does not exist
Error:(35, 13) error: cannot find symbol class PlusClient
Error:(279, 12) error: cannot find symbol class PlusClient
Error:(78, 31) error: package PlusClient does not exist
Error:(160, 65) error: package PlusClient does not exist
Error:(239, 5) error: method does not override or implement a method from a supertype …