DataBaseRoom.kt

package com.example.ayudapy

import android.content.Context
import androidx.room.Database
import androidx.room.Room
import androidx.room.RoomDatabase
@Database(entities = arrayOf(PedidoSave::class), version = 1)
abstract class pedidoDataBase : RoomDatabase() {
    abstract fun daoPedido():DaoPedido

    companion object {
        private var INSTANCE: pedidoDataBase? = null
        fun getInstance(context: Context): pedidoDataBase {
            if (INSTANCE == null) {
                INSTANCE = Room.databaseBuilder(
                    context,
                    pedidoDataBase::class.java,
                    "roomdb")
                    .build()
            }
            return INSTANCE as pedidoDataBase
        }
    }
}