Hello there,
I am excited to offer my services as a Freelancer to integrate OneSignal into your Android application built with Java. I have extensive experience using OneSignal as a library and can efficiently integrate Push Notifications into your application.
Furthermore, I can help you save push notification title, description, and all data in the room database. I understand your requirement to save push notifications even when the app is closed, and I assure you that I can achieve this seamlessly.
Please let me know if you have any questions or concerns. I look forward to working with you on this project.
Thank you for considering my bid.