Queria coletar os dados do usuário do face no meu App, porém, eu só recupero os dados quando o usuário entra pela segunda vez, a primeira vez o retorno está vindo nulo, mas quando faço de novo, sem fechar o App, os dados do usuário aparecem. O que posso fazer???

Segue o código:

public class CompartilharActivity extends AppCompatActivity {  CallbackManager callbackManager; ProgressDialog mDialog; private ShareDialog shareDialog; final Usuario user = new Usuario(); private String locationID;   @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_compartilhar);        shareDialog = new ShareDialog(this);  // intialize facebook shareDialog.      callbackManager = CallbackManager.Factory.create();      LoginButton loginButton = (LoginButton)findViewById(R.id.btnShareLinks);     loginButton.setReadPermissions(Arrays.asList("public_profile","email","user_birthday","user_location"));      loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {         @Override         public void onSuccess(LoginResult loginResult) {             mDialog = new ProgressDialog(CompartilharActivity.this);             mDialog.setMessage("Retrieving data...");             mDialog.show();              String accesstoken = loginResult.getAccessToken().getToken();              GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {                 @Override                 public void onCompleted(JSONObject object, GraphResponse response) {                     mDialog.dismiss();                     Log.d("response", response.toString());                     getData(object);                     try {                         user.setFirstName(object.getString("first_name"));                         user.setLastName(object.getString("last_name"));                         user.setEmail(object.getString("email"));                         user.setGender(object.getString("gender"));                         user.setBirthday(object.getString("birthday"));                         locationID = object.getJSONObject("location").getString("id");                         getLocationUser(locationID);                      } catch (JSONException e) {                         e.printStackTrace();                     }                 }             });              Bundle parameters = new Bundle();             parameters.putString("fields", "id,email,birthday,first_name,last_name,gender,location");             request.setParameters(parameters);             request.executeAsync();         }          @Override         public void onCancel() {          }          @Override         public void onError(FacebookException error) {          }     });    }  public void getData(JSONObject object) {   }  private void getLocationUser(String id) {     Bundle params = new Bundle();     params.putString("location", "id");     new GraphRequest(AccessToken.getCurrentAccessToken(), id + "/?fields=location", params, HttpMethod.GET,             new GraphRequest.Callback() {                 @Override                 public void onCompleted(GraphResponse response) {                     Log.e("Response 2", response + "");                     try {                         user.setCountry(String.valueOf(response.getJSONObject().getJSONObject("location").get("country")));                         user.setState(String.valueOf(response.getJSONObject().getJSONObject("location").get("state")));                         user.setCity(String.valueOf(response.getJSONObject().getJSONObject("location").get("city")));                         user.setStreet(String.valueOf(response.getJSONObject().getJSONObject("location").get("street")));                         user.setZip(String.valueOf(response.getJSONObject().getJSONObject("location").get("zip")));                         Log.e("Location", user.getCountry());                     } catch (Exception e) {                         e.printStackTrace();                     }                 }             }     ).executeAsync(); }   /*public void shareLinks(View view) {      if (ShareDialog.canShow(ShareLinkContent.class)) {         ShareLinkContent content = new ShareLinkContent.Builder()                 .setContentUrl(Uri.parse("http://androidlift.info"))                 .build();         shareDialog.show(content);     } }*/  @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {     super.onActivityResult(requestCode, resultCode, data);     callbackManager.onActivityResult(requestCode,resultCode,data);     Toast.makeText(this, this.user.getFirstName(),Toast.LENGTH_LONG).show();     Intent intent = new Intent(CompartilharActivity.this, FinalActivity.class);     intent.putExtra("usuario", this.user);     startActivity(intent); } }