Android : cannot get user_birthday from facebook

i having problem in the scenario of getting user_birthday from the facebook i have been tried many solution and i found that i cannot extra info from the first authentication log in so I've created another request for getting user birthday and i tried many accepted solution like this one but i still cannot get user email and the birthdate even when i tried to get age_range which is included in public_profile got nothing

and the facebook user is marked the birthdate as public i tried using sociauth library but with no success same problem

just i can get user birthday when i m using my account which is the dev of the app

finally i used loginbutton which is not my preferred scenario with permission

 authbutton.setReadPermissions(Arrays.asList("public_profile","user_birthday"));

the wired thing is i can now get email without adding email permission but still get null with the birhtday and age_range

this is my loginbutton code

authbutton=(LoginButton) findViewById(R.id.authButton);
    authbutton.setReadPermissions(Arrays.asList("public_profile","user_birthday"));
      // session state call back event
      authbutton.setSessionStatusCallback(new Session.StatusCallback() {
       @Override
       public void call(Session session, SessionState state, Exception exception) {
        if (session.isOpened()) {
                  Log.i("tag","Access Token"+ session.getAccessToken());
                  Request.newMeRequest(session,
                          new Request.GraphUserCallback() {
                              @Override
                              public void onCompleted(GraphUser user,Response response) {
                                  if (user != null) {
                                   Log.i("tag","User ID "+ user.getId());
                                   Log.i("tag","Email "+ user.asMap().get("email"));
                                   lable.setText(user.getBirthday().toString());
                                  }
                              }
                          }).executeAsync();

              }

       }
     });

Thanks in advance