How to display custom screen on APK with old certificate hash

Scenario:

We are currently near the expiration of our SSL Certificate and upon checking the user with the application that fail to update before the SSL Certificate will have the old hash and will cause an application to lock. The application will no longer receive an update from publishing application or even connect to server. 

Question is how can we implement a custom screen or message to all users who will have an outdated certificate hash?

Thanks and Regards,