Using room as singleton in kotlin

Question

I\'m trying to use Room as singleton so I didn\'t have to invoke Room.databaseBuilder() -which is expensive- more than once.

@Database(entities = ar         


        

Answer 1

singleton in kotlin is real easy just do this

companion object {
    @JvmStatic
    val DATABASE_NAME = "DataBase"

    @JvmField
    val database = Room.databaseBuilder(App.context(), DataBase::class.java, DataBase.DATABASE_NAME).build()

}