视图模型中的 distinctUntilChanged 不返回新获取的数据

Question

我正在使用一个简单的搜索视图，当我提交一个新字符串以在我的端点进行搜索时，它应该 return 一个不同的列表，而当我更改该字符串时它不会 return 新请求的列表，而只是 return 与我首先获取的列表相同

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 override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        setupRecyclerView()
        setupSearchView()
        setupDefaultTragosList()
    }

    private fun setupDefaultTragosList(){
        viewModel.setTrago("margarita")
        viewModel.fetchTragosList.observe(viewLifecycleOwner, Observer { result ->
            when(result){
                is Resource.Loading -> {
                    progressBar.visibility = View.VISIBLE
                }
                is Resource.Success -> {
                    progressBar.visibility = View.GONE
                    rv_tragos.adapter = MainAdapter(requireContext(),result.data,this)
                }
                is Resource.Failure -> {
                    progressBar.visibility = View.GONE
                    Log.e("MainFragment", "onRetrofitRequest: ${result.exception}")
                }
            }
        })
    }

    private fun setupSearchView(){
        searchView.setOnQueryTextListener(object:androidx.appcompat.widget.SearchView.OnQueryTextListener{

            override fun onQueryTextSubmit(query: String?): Boolean {
                viewModel.setTrago(query!!)
                return false
            }

            override fun onQueryTextChange(newText: String?): Boolean {return false}
        })
    }

视图模型

class MainViewModel(private val repo:Repo):ViewModel(){

    private val tragoNameData = MutableLiveData<String>()

    fun setTrago(tragoName:String){
        tragoNameData.value = tragoName
    }

    val fetchTragosList = tragoNameData.distinctUntilChanged().switchMap { tragoName ->
        liveData(Dispatchers.IO) {
            emit(Resource.Loading())
            try{
                emit(repo.getTragosList(tragoName))
            }catch (e: Exception){
                emit(Resource.Failure(e))
            }
        }
    }
}

似乎 distinctUntilChange 没有为新搜索的饮料重新获取我的端点，而是总是 returns margarita list of drinks

Answer 1

在一些外部技术支持下，答案是

interface WebService { 
    @GET("search.php?s=")
    suspend fun getTragoByName(@Query("tragoName") tragoName:String): DrinkList

    @GET("filter.php?a=")
    suspend fun getAlcoholicDrink(@Query("alcoholicOrNot") alcoholicOrNot:String): DrinkList
}

应该是

interface WebService {
    @GET("search.php")
    suspend fun getTragoByName(@Query("s") tragoName:String): DrinkList

    @GET("filter.php")
    suspend fun getAlcoholicDrink(@Query("a") alcoholicOrNot:String): DrinkList
}

视图模型中的 distinctUntilChanged 不返回新获取的数据

distinctUntilChanged in viewmodel not returning newly fetched data

android

android-fragments

kotlin

android-architecture-components

android-viewmodel

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视图模型