SmsForwarder/app/src/main/java/com/idormy/sms/forwarder/database/AppDatabase.java

package com.idormy.sms.forwarder.database;

import android.content.Context;

import androidx.room.Database;
import androidx.room.Room;
import androidx.room.RoomDatabase;

@Database(entities = {Config.class}, version = 2, exportSchema = false)
public abstract class AppDatabase extends RoomDatabase {
    private static volatile AppDatabase instance;

    public abstract ConfigDao configDao();

    public static AppDatabase getInstance(Context context) {
        if (instance == null) {
            synchronized (AppDatabase.class) {
                if (instance == null) {
                    instance = Room.databaseBuilder(context, AppDatabase.class, "sms_forwarder.db").build();
                }
            }
        }
        return instance;
    }
}