如何获得由 user.getBirthday用户的生日（）？

  Session.openActiveSession（这一点，真，新Session.StatusCallback（）{
      //回调时，会话状态变化
      @覆盖
      公共无效呼叫（会话的会话，SessionState会状态，例外的例外）{
        如果（session.isOpened（））{

          //使请求/ ME API
          Request.executeMeRequestAsync（会话，新Request.GraphUserCallback（）{

            //后与用户对象图形API响应回调
            @覆盖
            公共无效onCompleted（GraphUser用户，响应响应）{
              如果（用户！= NULL）{
                TextView的欢迎=（TextView中）findViewById（R.id.textView1）;
                welcome.setText（你好+ user.getBirthday（）+！）;
                Log.d（user_birthday，user_birthday：+ user.getBirthday（））; // user.getBirthday（）该值总是为空？
              }
            }
          }）;
        }
      }
    }）;
 

解决方案

首先必须设置权限user_birthday？如果您要访问user_birthday信息，这是非常重要的。

如果用户不是空通常可以通过user.getBirthday得到的生日（） 因为从我看到你正在使用的新的Facebook SDK

您可以在使用Facebook的authbutton设置，例如允许

  authButton.setReadPermissions（Arrays.asList（user_location，user_birthday，user_likes））;
 

也可以重新授权许可

  Session.ReauthorizeRequest reauthRequest =新Session.ReauthorizeRequest（本，权限）。
                    了setRequest code（REAUTHORIZE_ACTIVITY）。
                    setLoginBehavior（SessionLoginBehavior.SSO_WITH_FALLBACK）;
session.reauthorizeForPublish（reauthRequest）;
 

在哪里权限是包含您的许可的数组

How to get user birthday by user.getBirthday() ?

Session.openActiveSession(this, true, new Session.StatusCallback() {
      // callback when session changes state
      @Override
      public void call(Session session, SessionState state, Exception exception) {
        if (session.isOpened()) {

          // make request to the /me API
          Request.executeMeRequestAsync(session, new Request.GraphUserCallback() {

            // callback after Graph API response with user object
            @Override
            public void onCompleted(GraphUser user, Response response) {
              if (user != null) {
                TextView welcome = (TextView) findViewById(R.id.textView1);
                welcome.setText("Hello " + user.getBirthday() + "!");
                Log.d("user_birthday","user_birthday:"+user.getBirthday());//user.getBirthday()  this value always is null?
              }
            }
          });
        }
      }
    });

First of all have you set permission for user_birthday? it's very important if you want to access user_birthday information

if the user is not null usually you can get the birthday by user.getBirthday() because from what I see you're using the new facebook SDK

you can set permission for example when you using the facebook authbutton

authButton.setReadPermissions(Arrays.asList("user_location", "user_birthday", "user_likes"));

or you can reauthorize permission

Session.ReauthorizeRequest reauthRequest = new Session.ReauthorizeRequest(this, PERMISSIONS).
                    setRequestCode(REAUTHORIZE_ACTIVITY).
                    setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
session.reauthorizeForPublish(reauthRequest);

Where The PERMISSION is an array containing your permission