How does Room database work internally in Android SDK?

The Room database is a part of the Android Architecture Components and serves as an abstraction layer over SQLite. It allows developers to create a robust database structure while minimizing boilerplate code. Internally, Room uses annotations to define the database schema and to manage data access, ensuring type safety and compile-time checks.

At its core, Room consists of three main components: the Database, the Entity, and the Data Access Object (DAO). The Database represents the database itself, the Entity defines the data model, and DAO acts as an interface to access the database.

When you make a change in the database, Room listens for these changes, and it handles the threading by using LiveData or RxJava to ensure that updates happen on the UI thread when needed without blocking the main thread.