Im so sorry, it's because i really dont know about whats the problem is. my project is 100% kotlin language not a java language. Do i need to screenshot the fragment that have bug even it is so many? that why i provide a zip or you can see it on this link :
https://github.com/PeterKingori/My-Car-Maintenance sorry im new with this. If someone know how to implement a simple alarmmanager/workmanager in this project please let me know.