I add a routing rule below in index.php
$router->add("/MyController/{partner:[a-zA-Z0-9]{3}}",                  ['controller' => 'MyController',  'action' => 'handler'])
    ->convert('partner', function($partner) {
        return 'Android_' . $partner;
    });MyController->handlerAction
public function handlerAction()
{
    $partner = $this->dispatcher->getParam('partner');
    if (class_exists($partner)) {
        $p = new $partner();
        $p->process();
    } else {
        echo "Class {$partner} Not Found.";
    }
}and I put Android_XXX classes into application/library, but I got Class Android_XXX Not Found, any idea? library folder already register via \Phalcon\Loader.
Thanks.
Using registerPrefixes, the class can be found now.