code: public static void runExample(
        AdManagerServices adManagerServices, AdManagerSession session, int activityId)
        throws RemoteException {
      // Get the ActivityService.
      ActivityServiceInterface activityService =
          adManagerServices.get(session, ActivityServiceInterface.class);
  
      // Create a statement to only select a single activity by ID.
      StatementBuilder statementBuilder =
          new StatementBuilder()
              .where("id = :id")
              .orderBy("id ASC")
              .limit(1)
              .withBindVariableValue("id", activityId);
  
      // Get the activity.
      ActivityPage page = activityService.getActivitiesByStatement(statementBuilder.toStatement());
  
      // Get the activity.
      Activity activity = Iterables.getOnlyElement(Arrays.asList(page.getResults()));
  
      // Update the expected URL.
      activity.setExpectedURL("http://google.com");
  
      // Update the activity on the server.
      Activity[] activities = activityService.updateActivities(new Activity[] {activity});
  
      for (Activity updatedActivity : activities) {
        System.out.printf(
            "Activity with ID %d and name '%s' was updated.%n",
            updatedActivity.getId(), updatedActivity.getName());
      }
    }
docs: Runs the example.
  
  @param adManagerServices the services factory.
  @param session the session.
  @param activityId the ID of the activity to update.
  @throws ApiException if the API request failed with one or more service errors.
  @throws RemoteException if the API request failed due to other errors.