code: @Override
      public Loader<ProfileFieldContainer> onCreateLoader(int id, Bundle args) {
          switch (id) {
              case LoadersConfig.LOAD_PROFILE_LOADER_ID:
                  return new AsyncTaskLoader<ProfileFieldContainer>(getActivity()) {
  
                      @Override
                      public ProfileFieldContainer loadInBackground() {
                          if (mMode == Mode.SELF || mMode == Mode.EDIT) {
                              return SPF.get().getProfileManager().getProfileFieldBulk(mCurrentPersona, ProfilePagerAdapter.DEFAULT_FIELDS);
                          } else {
                              SPFRemoteInstance instance = SPF.get().getPeopleManager().getPerson(mPersonIdentifier);
                              if (instance == null) {
                                  throw new IllegalStateException("Person " + mPersonIdentifier + " not found in proximity");
                              } else {
                                  String app = getActivity().getCallingPackage();
                                  app = app == null ? "it.polimi.spf.app" : app;
                                  return instance.getProfileBulk(ProfileField.toIdentifierList(ProfilePagerAdapter.DEFAULT_FIELDS), app);
                              }
                          }
                      }
                  };
  
              case LoadersConfig.SAVE_PROFILE_LOADER_ID:
                  if (mMode != Mode.EDIT) {
                      Log.e(TAG, "SAVE_PROFILE_LOADER initialized in mode " + mMode);
                  }
  
                  return new AsyncTaskLoader<ProfileFieldContainer>(getActivity()) {
  
                      @Override
                      public ProfileFieldContainer loadInBackground() {
                          SPF.get().getProfileManager().setProfileFieldBulk(mContainer, mCurrentPersona);
                          return null;
                      }
                  };
  
              default:
                  throw new IllegalArgumentException("No loader for id " + id);
          }
      }
docs: /*
  LOADERS - Used to load and save profile data.