facebook

FacebookSdk.sdkInitialize(this);

    callbackManager = CallbackManager.Factory.create();

    LoginManager.getInstance()
        .registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
          @Override public void onSuccess(final LoginResult loginResult) {

            GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(),
                new GraphRequest.GraphJSONObjectCallback() {
                  @Override
                  public void onCompleted(JSONObject jsonObject, GraphResponse graphResponse) {
                    L.i(jsonObject.toString());

                    try {
                      String id = jsonObject.getString("id");
                      String access_token = loginResult.getAccessToken().getToken();
                      String name = jsonObject.getString("name");
                      String email = jsonObject.getString("email");
                      String first_name = jsonObject.getString("first_name");
                      String last_name = jsonObject.getString("last_name");
                      String gender =
                          (jsonObject.getString("gender").equalsIgnoreCase("male")) ? "1" : "2";
                      String picture = jsonObject.getJSONObject("picture")
                          .getJSONObject("data")
                          .getString("url");

                      Subscriber<User> subscriber = new Subscriber<User>() {
                        @Override public void onNext(User s) {
                          if (s.profile_image.equalsIgnoreCase("")) s.profile_image = RandomGenerator.getImageURL();

                          DataUtils.WriteObject(LoginActivity.this, DATA.USER, s);
                        }

                        @Override public void onCompleted() {
                          dialog_login.dismiss();
                        
                        }

                        @Override public void onStart() {
                          dialog_login.show();
                        }

                        @Override public void onError(Throwable e) {
                          e.printStackTrace();
                          dialog_login.dismiss();
                          DialogFactory.createGenericErrorDialog(LoginActivity.this, e.getMessage()).show();
                        }
                      };

                      

                    } catch (JSONException e) {
                      e.printStackTrace();
                    }
                  }
                });

           
          }

          @Override public void onCancel() {
            Toast.makeText(LoginActivity.this, "Login Cancel", Toast.LENGTH_LONG).show();
          }

          @Override public void onError(FacebookException exception) {
            Toast.makeText(LoginActivity.this, exception.getMessage(), Toast.LENGTH_LONG).show();
          }
        });