您必须在应用程序中使用Google朋友群。然后，一旦用户使用他的Gmail帐户登录您的应用程序，您就可以获得用户的详细信息。

了解更多信息 -



http://www.google.com/friendconnect/home/overview [ ^ ]



https://developers.google.com/accounts/docs/AuthForWebApps [ ^ ]

You have to use Google Friend Connect in your application. Then, u will can details of user once user signs into your app using his gmail account.
for more info-

http://www.google.com/friendconnect/home/overview[^]

https://developers.google.com/accounts/docs/AuthForWebApps[^]