code: @Override
  	public void getActionsByUser(Activity context, long userId, int start, int end, ActionListListener listener) {
  		activitySystem.getActivityByUser(Socialize.getSocialize().getSession(), userId, start, end, listener);
  	}
docs: /* (non-Javadoc)
  @see com.socialize.api.action.activity.ActivityUtilsProxy#getActivityByUser(android.app.Activity, com.socialize.entity.User, int, int, com.socialize.listener.activity.UserActivityListListener)