如何使用kotlin with Room加载回收器视图中的Sqlite数据？

@Entity(tableName = "users")
data class User(
    @PrimaryKey val id: Int,
    val name: String,
    val age: Int
)

@Dao
interface UserDao {
    @Query("SELECT * FROM users")
    fun getAllUsers(): List<User>

    @Insert
    fun insertUser(user: User)

    // 其他操作方法...
}

@Database(entities = [User::class], version = 1)
abstract class AppDatabase : RoomDatabase() {
    abstract fun userDao(): UserDao

    companion object {
        @Volatile
        private var INSTANCE: AppDatabase? = null

        fun getDatabase(context: Context): AppDatabase {
            return INSTANCE ?: synchronized(this) {
                val instance = Room.databaseBuilder(
                    context.applicationContext,
                    AppDatabase::class.java,
                    "app_database"
                ).build()
                INSTANCE = instance
                instance
            }
        }
    }
}

class UserAdapter(private val context: Context) : RecyclerView.Adapter<UserAdapter.ViewHolder>() {
    private var userList: List<User> = listOf()

    inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val nameTextView: TextView = itemView.findViewById(R.id.nameTextView)
        val ageTextView: TextView = itemView.findViewById(R.id.ageTextView)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val itemView = LayoutInflater.from(context).inflate(R.layout.user_item, parent, false)
        return ViewHolder(itemView)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val currentUser = userList[position]
        holder.nameTextView.text = currentUser.name
        holder.ageTextView.text = currentUser.age.toString()
    }

    override fun getItemCount(): Int {
        return userList.size
    }

    fun setUserList(users: List<User>) {
        userList = users
        notifyDataSetChanged()
    }
}

class MainActivity : AppCompatActivity() {
    private lateinit var userAdapter: UserAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        userAdapter = UserAdapter(this)
        recyclerView.adapter = userAdapter
        recyclerView.layoutManager = LinearLayoutManager(this)

        val userDao = AppDatabase.getDatabase(this).userDao()
        val userList = userDao.getAllUsers()
        userAdapter.setUserList(userList)
    }
}