從視圖中插入帶有空間的數據：無法訪問主線程上的數據庫

我是 kotlin 和 android 開發的初學者。我在 Room教程中遵循了Persist data並且我有一個流行的問題來保存我的數據：

Cannot access database on the main thread since it may potentially lock the UI for a long period of time.

我通過閱讀其他回復來理解原因。但我不明白如何處理它。

我的實體及其 DAO ：

@Entity
data class AccountConfiguration(
    @PrimaryKey val server_address: String,
    @ColumnInfo(name = "user_name") val user_name: String,
    @ColumnInfo(name = "password") val password: String,  // FIXME : secure storage
    @ColumnInfo(name = "notify_hungry") val notify_hungry: Boolean,
    @ColumnInfo(name = "notify_thirsty") val notify_thirsty: Boolean,
    @ColumnInfo(name = "notify_ap") val notify_ap: Boolean,
    @ColumnInfo(name = "network_grab_each") val network_grab_each: Int,
)

@Dao
interface AccountConfigurationDao {
    @Query("SELECT * FROM accountconfiguration LIMIT 1")
    fun get(): Flow<AccountConfiguration>

    @Query("DELETE FROM accountconfiguration")
    fun clear()

    @Insert
    fun insert(account_configuration: AccountConfiguration)
}

它的視圖模型：

class AccountConfigurationViewModel(private val repository: AccountConfigurationRepository) : ViewModel() {

    val accountConfiguration: LiveData<AccountConfiguration> = repository.accountConfiguration.asLiveData()

    fun insert(account_configuration: AccountConfiguration) = viewModelScope.launch {
        repository.update(account_configuration)
    }

    fun isEntryValid(server_address: String, user_name: String, password: String, network_grab_each: Int): Boolean {
        if (server_address.isBlank() || user_name.isBlank() || password.isBlank() || network_grab_each < 5 * 60) {
            return false
        }
        return true
    }

}

在數據庫和應用。

然後，有關視圖的一部分（此處為整個文件）：

class AccountConfigurationFragment : Fragment() {

    private var _binding: AccountConfigurationFragmentBinding? = null

    // This property is only valid between onCreateView and
    // onDestroyView.
    private val binding get() = _binding!!

    private val viewModel: AccountConfigurationViewModel by activityViewModels {
        AccountConfigurationViewModelFactory(
            (activity?.application as RollingDashboardApplication).account_configuration_repository
        )
    }
    lateinit var accountConfiguration: AccountConfiguration

    // [...] hidden code

    private fun save() {
        Toast.makeText(context, R.string.saving, Toast.LENGTH_LONG).show()
        if (isEntryValid()) {
            val networkGrabEach = 3600 // FIXME : determine value for real

            viewModel.insert(
                AccountConfiguration(
                    server_address = binding.textInputServerAddress.text.toString(),
                    // [...] hidden code
                    network_grab_each = networkGrabEach,
                )
            )
            Toast.makeText(context, R.string.account_configuration_saved, Toast.LENGTH_LONG).show()
            findNavController().navigate(R.id.action_AccountConfigurationFragment_to_DashboardFragment)
        } else {
            Toast.makeText(context, R.string.wrong_inputs, Toast.LENGTH_LONG).show()
        }

    }

    // [...] hidden code
}

我不明白這個調用viewModel.insert(是如何異步的。NoteAccountConfigurationRepository.update已經是一個suspend函數。我嘗試通過這樣的修改沒有成功（同樣的錯誤）：

-    fun insert(account_configuration: AccountConfiguration) = viewModelScope.launch {
+    suspend fun insert(account_configuration: AccountConfiguration) = viewModelScope.launch {

            lifecycleScope.launch { // coroutine on Main
                viewModel.insert(
                    // ...

我怎樣才能讓這個數據庫插入非阻塞 UI？