如何在Android中链接API，以便在仓库类中使用retrofit、flow、NetworkBoundResource从服务器检索所有页面？

implementation 'com.squareup.retrofit2:retrofit:2.x.x'
implementation 'com.squareup.retrofit2:converter-gson:2.x.x'
implementation 'com.squareup.okhttp3:okhttp:4.x.x'
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.x.x'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.x.x'
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.x.x'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.x.x'
implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.x.x'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.x.x'

public interface ApiService {
    @GET("pages")
    suspend fun getPages(): Response<List<Page>>
}

val retrofit = Retrofit.Builder()
    .baseUrl("https://api.example.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .client(OkHttpClient.Builder().build())
    .build()

val apiService = retrofit.create(ApiService::class.java)

class PageRepository(private val apiService: ApiService) {
    suspend fun getPages(): List<Page> {
        val response = apiService.getPages()
        if (response.isSuccessful) {
            return response.body() ?: emptyList()
        } else {
            throw ApiException(response.code(), response.message())
        }
    }
}

class PageViewModel(private val pageRepository: PageRepository) : ViewModel() {
    private val _pages = MutableStateFlow<List<Page>>(emptyList())
    val pages: StateFlow<List<Page>> = _pages

    fun fetchPages() {
        viewModelScope.launch {
            try {
                val result = pageRepository.getPages()
                _pages.emit(result)
            } catch (e: Exception) {
                // Handle error
            }
        }
    }
}

class MainActivity : AppCompatActivity() {
    private val viewModel: PageViewModel by viewModels()

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

        viewModel.pages.observe(this) { pages ->
            // Update UI with the retrieved pages
        }

        viewModel.fetchPages()
    }
}