Redirect Url in magento2? [duplicate]

Question

How to redirect from Observer in Magento2 ? I am using the below code:

$controller = $observer->getControllerAction();
$action = $this->_request->getActionName();
$this->_actionFlag->set($action, \Magento\Framework\App\Action\Action::FLAG_NO_DISPATCH, true);
$controller->getResponse()->setRedirect('sales/order/address', array('address_id' => $addressId));
return $this;

event.xml

<event name="controller_action_predispatch_sales_order_addressSave">
    <observer name="verify_cod" instance="XXX\Ccc\Observer\Pincode" />
</event>

Answer 1

Try the following code to do redirects on observer:

 $url = $this->urlInterface->getUrl('customer/account/login');
            $observer->getControllerAction()
                ->getResponse()
                ->setRedirect($url);

Answer 2

You have to use constructor for it.

Below code working for me.

namespace ......

class something
{
public function __construct(

    \Magento\Framework\App\ResponseFactory $responseFactory,
    \Magento\Framework\UrlInterface $url,

) {
    $this->_responseFactory = $responseFactory;
    $this->_url = $url;

}

 public function execute()
{
   $CustomRedirectionUrl = $this->_url->getUrl('*/*/');
    $this->_responseFactory->create()->setRedirect($CustomRedirectionUrl)->sendResponse();
    exit();
}
}