Room Database
Local database with Room: Entity, DAO, Database, Relations, Migrations, TypeConverters, LiveData and Flow
1What is Room in Android?
What is Room in Android?
Câu trả lời
Room is a persistence library that provides an abstraction layer over SQLite. It simplifies database access with annotations and generates code to avoid boilerplate. Room is part of Android Jetpack.
2What are the 3 main components of Room?
What are the 3 main components of Room?
Câu trả lời
The 3 main components of Room are: 1) Entity (represents a table), 2) DAO (Data Access Object, contains queries), 3) Database (abstract class containing database configuration and DAOs).
3What is the @Entity annotation used for in Room?
What is the @Entity annotation used for in Room?
Câu trả lời
@Entity marks a class as a database table. Each field in the class becomes a column. By default, the table name is the class name, but it can be customized with tableName.
How to define a primary key in a Room Entity?
What is the @ColumnInfo annotation used for?
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