我在 mainactivity 哪里出错了？

Question

我正在开发 android 应用程序，当我在 mainactivity.kt 中实现网络调用时，我收到以下错误屏幕截图我想知道我哪里出错了

低于我的MainActivity.kt

class MainActivity : AppCompatActivity() {

    private var adapter: CurrenciesAdapter? = null


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


        recycler_main.layoutManager = LinearLayoutManager(this@MainActivity)
        adapter = CurrenciesAdapter(this)

        recycler_main.adapter = adapter

        if (isInternetAvailable()) {
            getUsersData()
        }
    }


    private fun getUsersData() {

        showProgressBar()

        var apiInterface: CurrenciesResponse = CurrencyClient().getApiClient()!!.create(
            CurrenciesResponse::class.java
        )

        apiInterface.getCurrencies().enqueue(object : Callback <List<CurrencyResponse>> {
             override fun onResponse(
                    call: Call<List<CurrencyResponse>>,
                    response: Response<List<CurrencyResponse>>)

             {
            hideProgressBar()
            val currencyResponse = response.body()
            adapter?.list = currencyResponse!!
        }

            override fun onFailure(call: Call<List<CurrencyResponse>>, t: Throwable) {
            hideProgressBar()
            Log.e("error", t.localizedMessage)
        }
        })
    }
}

我做了什么我已将响应类型从 https://gist.github.com/kyodgorbek/d0d9b3749ac64f15b4db87874cfe13e7

Answer 1

您在 CurrenciesResponse.class 中的 getCurrencies() 方法具有 return 类型的 CurrenciesResponse 而它应该是 List<CurrenciesResponse>.

您需要修复 retrofit's service interface。

我在 mainactivity 哪里出错了？

where I am making mistake in mainactivity?

android

kotlin

retrofit