import com.facebook.FacebookAuthorizationException; //导入依赖的package包/类
private void registerFacebookCallback() {
  final PublishSubject<String> fbAccessToken = this.facebookAccessToken;
  final BehaviorSubject<FacebookException> fbAuthError = this.facebookAuthorizationError;

  this.callbackManager = CallbackManager.Factory.create();

  LoginManager.getInstance().registerCallback(this.callbackManager, new FacebookCallback<LoginResult>() {
    @Override
    public void onSuccess(final @NonNull LoginResult result) {
      fbAccessToken.onNext(result.getAccessToken().getToken());
    }

    @Override
    public void onCancel() {
      // continue
    }

    @Override
    public void onError(final @NonNull FacebookException error) {
      if (error instanceof FacebookAuthorizationException) {
        fbAuthError.onNext(error);
      }
    }
  });
}
 

import com.facebook.FacebookAuthorizationException; //导入依赖的package包/类
protected void execute() {
    if (sessionManager.isLoggedIn()) {
        AccessToken accessToken = sessionManager.getAccessToken();
        Bundle bundle = updateAppSecretProof();
        GraphRequest request = new GraphRequest(accessToken, getGraphPath(),
                bundle, HttpMethod.GET);
        request.setVersion(configuration.getGraphVersion());
        runRequest(request);
    } else {
        String reason = Errors.getError(Errors.ErrorMsg.LOGIN);
        Logger.logError(getClass(), reason, null);
        if (mSingleEmitter != null) {
            mSingleEmitter.onError(new FacebookAuthorizationException(reason));
        }
    }
}
 

import com.facebook.FacebookAuthorizationException; //导入依赖的package包/类
public void fbLogin(final FBLoginInterface fbLoginInterface, final Activity activity) {
    List<String> permissionNeeds = Arrays.asList("email");
    LoginManager.getInstance().logInWithReadPermissions(activity, permissionNeeds);
    LoginManager.getInstance().registerCallback(callbackManager,
            new FacebookCallback<LoginResult>() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {

                        @Override
                        public void onCompleted(JSONObject object, GraphResponse response) {
                            Bundle facebookBundle = getFacebookData(object);
                            fbLoginInterface.doTaskAfterLogin(facebookBundle);
                        }
                    });

                    Bundle parameters = new Bundle();
                    parameters.putString("fields", "id, first_name, last_name, email,gender, birthday, location"); // Parámetros que pedimos a facebook
                    request.setParameters(parameters);
                    request.executeAsync();
                }

                @Override
                public void onCancel() {

                }

                @Override
                public void onError(FacebookException error) {
                    if (error instanceof FacebookAuthorizationException) {
                        if (AccessToken.getCurrentAccessToken() != null) {
                            LoginManager.getInstance().logOut();
                            fbLogin(fbLoginInterface, activity);
                        }
                    }
                }
            });
}
 

import com.facebook.FacebookAuthorizationException; //导入依赖的package包/类
private void onSessionCallback(Session paramSession, SessionState paramSessionState, Exception paramException, DialogListener paramDialogListener)
{
  Bundle localBundle = paramSession.getAuthorizationBundle();
  if (paramSessionState == SessionState.OPENED)
  {
    Session localSession2;
    synchronized (this.lock)
    {
      Session localSession1 = this.session;
      localSession2 = null;
      if (paramSession != localSession1)
      {
        localSession2 = this.session;
        this.session = paramSession;
        this.sessionInvalidated = false;
      }
    }
    if (localSession2 != null)
      localSession2.close();
    paramDialogListener.onComplete(localBundle);
    return;
  }
  if (paramException != null)
  {
    if ((paramException instanceof FacebookOperationCanceledException))
    {
      paramDialogListener.onCancel();
      return;
    }
    if (((paramException instanceof FacebookAuthorizationException)) && (localBundle != null) && (localBundle.containsKey("com.facebook.sdk.WebViewErrorCode")) && (localBundle.containsKey("com.facebook.sdk.FailingUrl")))
    {
      paramDialogListener.onError(new DialogError(paramException.getMessage(), localBundle.getInt("com.facebook.sdk.WebViewErrorCode"), localBundle.getString("com.facebook.sdk.FailingUrl")));
      return;
    }
    paramDialogListener.onFacebookError(new FacebookError(paramException.getMessage()));
  }
}