mydbroom.kt

@Database(
    entities = [MdlMovie::class, MdlLastPlay::class],
    version = 16, exportSchema = false
)
@TypeConverters(Converters::class)
abstract class RoomDB : RoomDatabase() {
    abstract fun appDao(): AppDao

    companion object {
        private var INSTANCE: RoomDB? = null
        fun getDatabase(context: Context): RoomDB {
            if (INSTANCE == null) {
                synchronized(RoomDB::class.java) {
                    if (INSTANCE == null) {
                        INSTANCE = Room.databaseBuilder(context.applicationContext, RoomDB::class.java, "sands_db")
                            .fallbackToDestructiveMigration()
                            //.addTypeConverter(converterFactory)
                            .allowMainThreadQueries()
                            .build()
                    }
                }
            }
            return INSTANCE!!
        }
    }
}