Room Persistence Library is a library that provides an abstraction layer over SQLite, the default database for Android applications. Room Persistence Library simplifies the creation and management of local data sources, and enables developers to use SQLite databases without writing tedious and error-prone SQL queries. Room Persistence Library also supports LiveData and RxJava, which are reactive frameworks that allow the app to observe and react to data changes in real time.
Room Persistence Library consists of three main components: entities, DAOs, and databases. Entities are classes that represent the tables in the database, and define the columns, primary keys, foreign keys, indices, and other constraints. Entities are annotated with @Entity, and their fields are annotated with @ColumnInfo, @PrimaryKey, @ForeignKey, @Index, and other annotations. DAOs are interfaces that define the data access objects, which are the methods that allow the app to perform CRUD (create, read, update, delete) operations on the database. DAOs are annotated with @Dao, and their methods are annotated with @Insert, @Query, @Update, @Delete, and other annotations. Databases are classes that extend the RoomDatabase abstract class, and provide the app with a single access point to the database. Databases are annotated with @Database, and contain references to the entities and DAOs that are part of the database.
Room Persistence Library is a library that provides an abstraction layer over SQLite, the default database for Android applications. Room Persistence Library simplifies the creation and management of local data sources, and enables developers to use SQLite databases without writing tedious and error-prone SQL queries. Room Persistence Library also supports LiveData and RxJava, which are reactive frameworks that allow the app to observe and react to data changes in real time. Room Persistence Library consists of three main components: entities, DAOs, and databases, which are annotated with various annotations to define the structure and behavior of the database. Room Persistence Library is a convenient and reliable solution for building data-driven Android apps.
