Registering the View

Just as we have to teach our RoomDatabase about entities, we have to teach it about database views. For entities, we have an entities array that we supply to the @Database annotation. For database views, we have a view array that fills the same role:

@Database(
  entities = [
    AutoGenerateEntity::class,
    CompositeKeyEntity::class,
    UniqueIndexEntity::class,
    IgnoredPropertyEntity::class,
    NullablePropertyEntity::class,
    CustomColumnNameEntity::class,
    IndexedEntity::class,
    AppEntity::class,
    AggregateEntity::class,
    TransmogrifyingEntity::class,
    EmbeddedLocationEntity::class,
    DefaultValueEntity::class,
    com.commonsware.room.misc.onetomany.Book::class,
    com.commonsware.room.misc.onetomany.Category::class,
    com.commonsware.room.misc.manytomany.Book::class,
    com.commonsware.room.misc.manytomany.Category::class,
    com.commonsware.room.misc.manytomany.BookCategoryJoin::class,
    LinkEntity::class,
    CommentEntity::class,
    NoteEntity::class,
    AutoEnumEntity::class
  ],
  views = [
    AppView::class
  ],
  version = 1
)

(from MiscSamples/src/main/java/com/commonsware/room/misc/MiscDatabase.kt)

So, here, we tell MiscDatabase that we have a single @DatabaseView, named AppView.