Kotlin Json 按 activity 选择列出

Question

我有一个问题。我在我的项目中列出了来自 API 的数据。我在我的项目中添加了导航抽屉菜单。这些是 NewsActivity 和 UsNewsActivity.2 activity 中的相同片段。我想要做的是在单击 NewsActivity 时列出 getBreakingNews 并列出 UsGetBreakingNews.When 我单击 UsNewsActivity.In 最后一部分，我想通过检查哪个 activity 来列出突发新闻片段你来自。我已经删除了所需的类。如果你能帮上忙，我会很高兴。

NewsRepository.kt

class NewsRepository(
    val db: ArticleDatabase
) {
    suspend fun getBreakingNews(countryCode: String, pageNumber: Int) =
        RetrofitInstance.api.getBreakingNews(countryCode, pageNumber)

    suspend fun getUsBreakingNews(countryCode: String, pageNumber: Int) =
        RetrofitInstance.api.getUsBreakingNews(countryCode, pageNumber)

NewsActivity

   nav_view.setNavigationItemSelectedListener {
            when (it.itemId) {
                R.id.country1 -> {
                    val intent = Intent(this, NewsActivity::class.java)
                    startActivity(intent)
                }
                R.id.country2->{
                    val intent = Intent(this, UsNewsActivity::class.java)
                    startActivity(intent)

                }

            }
            true

        }
    }  

    override fun onOptionsItemSelected(item: MenuItem): Boolean {

        if (toggle.onOptionsItemSelected(item)){
            return true
        }

        return super.onOptionsItemSelected(item)
    }

NewsViewModel.kt

val breakingNews: MutableLiveData<Resource<NewsResponse>> = MutableLiveData()
    var breakingNewsPage = 1
    var breakingNewsResponse:NewsResponse?=null
    val usBreakingNews:MutableLiveData<Resource<NewsResponse>> = MutableLiveData()
    var usBreakingNewsPage = 1
    var usBreakingNewsResponse:NewsResponse?=null

init {
        getBreakingNews("tr")
        getUsBreakingNews("us")}

  fun getBreakingNews(countryCode: String) = viewModelScope.launch {
        breakingNews.postValue(Resource.Loading())
        val response = newsRepository.getBreakingNews(countryCode, breakingNewsPage)
        breakingNews.postValue(handleBreakingNewsResponse(response))
    }
    fun getUsBreakingNews(countryCode: String) = viewModelScope.launch {
        usBreakingNews.postValue(Resource.Loading())
        val response = newsRepository.getBreakingNews(countryCode, breakingNewsPage)
        usBreakingNews.postValue(handleBreakingNewsResponse(response))
    }

BreakingNewsFragment.kt

if(shouldPaginate){

                

                viewModel.getUsBreakingNews("tr")
                isScrooling=false

            }

控制

Answer 1

创建片段并将其附加到 activity 后，您可以检查 activity 它附加到什么。

在您的片段中，将其放入 onCreate()

if(activity!! is NewsActivity){
//do something
}

Kotlin Json 按 activity 选择列出

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