final Session session = Session.getActiveSession();
    if (session != null && session.isOpened()) {
        // If the session is open,make an API call to get user data
        // and define a new callback to handle the response
        Request request = Request.newMeRequest(session,new Request.GraphUserCallback() {
            @Override
            public void onCompleted(GraphUser user,Response response) {
                // If the response is successful
                if (session == Session.getActiveSession()) {
                    if (user != null) {
                        user_ID = user.getId();//user id
                        profileName = user.getName();//user's profile name
                        userNameView.setText(user.getName());
                    }   
                }   
            }   
        }); 
        Request.executeBatchAsync(request);
    }

user_ID& profileName是字符串.

对于accessToken：

String token = session.getAccessToken();

EDITED：(13/1/2014)

对于用户电子邮件(我没有通过在设备或模拟器上运行来检查此代码)：

这些只是我的意见,或者你可以称之为建议

setReadPermissions(Arrays.asList("email",...other permission...));
//by analyzing the links bellow,i think you can set the permission in loginbutton as:
loginButton.setReadPermissions(Arrays.asList("email",...other permission...));
user.asMap().get("email");

更多信息请看：
link1,link2,link3,link4,