Sample Joomla logout & redirect view

default.xml

<?xml version="1.0" encoding="utf-8"?>
<metadata>
	<layout title="COM_MYCOMPONENT_TITLE_VIEW_LOGOUT" option="View">
        <message>
			<![CDATA[COM_MYCOMPONENT_TITLE_VIEW_LOGOUT_DESC]]>
        </message>
	</layout>
	<fields name="params">
		<fieldset name="basic">
			<field
				name="redirectUrl"
				type="menuitem"
				label="COM_MYCOMPONENT_LOGOUT_REDIRECT_URL"
				description="COM_MYCOMPONENT_LOGOUT_REDIRECT_URL_DESC"
				>
			</field>
		</fieldset>
	</fields>
</metadata>

view.html.php

<?php
/**
 * @package     Mycomponent.Frontend
 * @subpackage  View
 *
 * @copyright   Copyright (C) 2014 Roberto Segura. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('_JEXEC') or die;

/**
 * Logout View.
 *
 * @package     Mycomponent.Frontend
 * @subpackage  View
 * @since       1.0
 */
class MycomponentViewLogout extends JViewLegacy
{
	/**
	 * Method to override in each controller
	 *
	 * @param   boolean  $cachable   If true, the view output will be cached
	 * @param   array    $urlparams  An array of safe url parameters and their variable types, for valid values see {@link JFilterInput::clean()}.
	 *
	 * @return  string
	 */
	public function display($cachable = false, $urlparams = array())
	{
		$app = JFactory::getApplication();
		$pageParams = $app->getParams();
		$itemId = $pageParams->get("redirectUrl");
		$redirectUrl = JUri::root();

		if ($itemId)
		{
			$menuItem = $app->getMenu()->getItem($itemId);
			$redirectUrl = JRoute::_($menuItem->link . '&Itemid=' . $menuItem->id, false);
		}

		$link = "index.php?option=com_users&task=user.logout&" . JSession::getFormToken() . "=1"
			. "&return=" . base64_encode(htmlspecialchars_decode($redirectUrl));

		$app = JFactory::getApplication();
		$app->enqueueMessage(JText::_('COM_MYCOMPONENT_USER_DISCONNECTED'), 'message');
		$app->redirect(JRoute::_($link, false));

		return false;
	}
}