androidx.room

---

Kotlin |Java

Annotations

AutoMigration	Declares an automatic migration on a Database.
BuiltInTypeConverters	Flags to turn on/off extra type converters provided by Room.
ColumnInfo	Allows specific customization about the column associated with this field.
ColumnInfo.Collate
ColumnInfo.SQLiteTypeAffinity	The SQLite column type constants that can be used in typeAffinity()
Dao	Marks the class as a Data Access Object.
Database	Marks a class as a RoomDatabase.
DatabaseView	Marks a class as an SQLite view.
Delete	Marks a method in a Dao annotated class as a delete method.
DeleteColumn	Repeatable annotation declaring the deleted columns in the AutoMigration.to version of an auto migration.
DeleteColumn.Entries	Container annotation for the repeatable annotation DeleteColumn.
DeleteTable	Repeatable annotation declaring the deleted tables in the AutoMigration.to version of an auto migration.
DeleteTable.Entries	Container annotation for the repeatable annotation DeleteTable.
Embedded	Marks a field of an Entity or POJO to allow nested fields (i.e. fields of the annotated field's class) to be referenced directly in the SQL queries.
Entity	Marks a class as an entity.
ExperimentalRoomApi	APIs marked with ExperimentalRoomApi are experimental and may change.
ForeignKey	Declares a foreign key on another Entity.
ForeignKey.Action	Constants definition for values that can be used in onDelete and onUpdate.
Fts3	Marks an Entity annotated class as a FTS3 entity.
Fts4	Marks an Entity annotated class as a FTS4 entity.
Ignore	Ignores the marked element from Room's processing logic.
Index	Declares an index on an Entity. see: SQLite Index Documentation
Insert	Marks a method in a Dao annotated class as an insert method.
Junction	Declares a junction to be used for joining a relationship.
MapColumn	Declares which column is used to build a map or multimap return value in a Dao query method.
MapInfo	This annotation is deprecated. Use @MapColumn instead.
OnConflictStrategy	Set of conflict handling strategies for various {@link Dao} methods.
PrimaryKey	Marks a field in an Entity as the primary key.
ProvidedAutoMigrationSpec	Marks a class as an auto migration spec that will be provided to Room at runtime.
ProvidedTypeConverter	Marks a class as a type converter that will be provided to Room at runtime.
Query	Marks a method in a Dao annotated class as a query method.
RawQuery	Marks a method in a Dao annotated class as a raw query method where you can pass the query as a androidx.sqlite.db.SupportSQLiteQuery.
Relation	A convenience annotation which can be used in a POJO to automatically fetch relation entities.
RenameColumn	Repeatable annotation declaring the renamed columns in the AutoMigration.to version of an auto migration.
RenameColumn.Entries	Container annotation for the repeatable annotation RenameColumn.
RenameTable	Repeatable annotation declaring the renamed tables in the new version of an auto migration.
RenameTable.Entries	Container annotation for the repeatable annotation RenameTable.
RewriteQueriesToDropUnusedColumns	When present, RewriteQueriesToDropUnusedColumns annotation will cause Room to rewrite your Query methods such that only the columns that are used in the response are queried from the database.
SkipQueryVerification	Skips database verification for the annotated element.
Transaction	Marks a method in a Dao class as a transaction method.
TypeConverter	Marks a method as a type converter.
TypeConverters	Specifies additional type converters that Room can use.
Update	Marks a method in a Dao annotated class as an update method.
Upsert	Marks a method in a Dao annotated class as an upsert (insert or update) method.

Interfaces

PooledConnection	A wrapper of SQLiteConnection that belongs to a connection pool and is safe to use in a coroutine.
RoomOpenDelegateMarker	Marker interface for Room's code generated delegate.
TransactionScope	A PooledConnection with an active transaction capable of performing nested transactions.
Transactor	A PooledConnection that can perform transactions.

Classes

DatabaseConfiguration	Configuration class for a RoomDatabase.
InvalidationTracker	The invalidation tracker keeps track of tables modified by queries and notifies its subscribed Observers about such modifications.
InvalidationTracker.Observer	An observer that can listen for changes in the database by subscribing to an InvalidationTracker.
MultiInstanceInvalidationService	A Service for remote invalidation among multiple InvalidationTracker instances.
RoomDatabase	Base class for all Room databases.
RoomDatabase.Builder	Builder for RoomDatabase.
RoomDatabase.Callback	Callback for RoomDatabase
RoomDatabase.MigrationContainer	A container to hold migrations.
RoomDatabaseKt
RoomWarnings	The list of warnings that are produced by Room.
RxRoom	Helper class to add RxJava2 support to Room.
TransactorKt
FtsOptions	Available option values that can be used with Fts3&Fts4.
Room	Entry point for building and initializing a RoomDatabase.

Enums

BuiltInTypeConverters.State	Control flags for built in converters.
FtsOptions.MatchInfo
FtsOptions.Order
Index.Order
RoomDatabase.JournalMode	Journal modes for SQLite database.
Transactor.SQLiteTransactionType	Transaction types.

Exceptions

EmptyResultSetException

Thrown by Room when the query in a Single DAO method needs to return a result but the returned result from the database is empty.