Callback

Kotlin |Java

abstract class Callback

kotlin.Any
↳	androidx.room.RoomDatabase.Callback

Callback for RoomDatabase.

Summary

Public constructors
`<init>()` Callback for `RoomDatabase`.

Public methods
open Unit	`onCreate(@NonNull db: SupportSQLiteDatabase)` Called when the database is created for the first time.
open Unit	`onDestructiveMigration(@NonNull db: SupportSQLiteDatabase)` Called after the database was destructively migrated
open Unit	`onOpen(@NonNull db: SupportSQLiteDatabase)` Called when the database has been opened.

Callback()

Callback for RoomDatabase.

open fun onCreate(@NonNull db: SupportSQLiteDatabase): Unit

Called when the database is created for the first time. This is called after all the tables are created.

Parameters
`db`	SupportSQLiteDatabase: The database.

open fun onDestructiveMigration(@NonNull db: SupportSQLiteDatabase): Unit

Called after the database was destructively migrated

Parameters
`db`	SupportSQLiteDatabase: The database.

open fun onOpen(@NonNull db: SupportSQLiteDatabase): Unit

Called when the database has been opened.

Parameters
`db`	SupportSQLiteDatabase: The database.