E / AndroidRuntime:致命例外:main和协程,Retrofit2

时间:2018-12-18 18:38:54

标签: android kotlin retrofit2 coroutine kotlinx.coroutines

我刚刚开始学习kotlin,我的第一个应用程序使用Retrofit2和Coroutine,但是有问题。我有一些错误,但是通过协程,堆栈跟踪的信息非常少。也许有人会发现错误或知道热点,从而使堆栈跟踪更有意义。

ApiService:

const val API_KEY = "Bcae2032bb596c73b10bdab625c037da"

interface CurrencyApi {

//https://api.currencystack.io/currency?base=USD&target=EUR&apikey=Bcae2032bb596c73b10bdab625c037da

@GET("currency")
fun getCurrentCurrency(
    @Query("base") base: String,
    @Query("target") target: String
): Deferred<Currency>

companion object {
    operator fun invoke(): CurrencyApi {
        val requestInterceptor = Interceptor { chain ->

            val url = chain.request()
                .url()
                .newBuilder()
                .addQueryParameter("key", API_KEY)
                .build()
            val request = chain.request()
                .newBuilder()
                .url(url)
                .build()

            return@Interceptor chain.proceed(request)
        }

        val okHttpClient = OkHttpClient.Builder()
            .addInterceptor(requestInterceptor)
            .build()

        return Retrofit.Builder()
            .client(okHttpClient)
            .baseUrl("https://api.currencystack.io/")
            .addCallAdapterFactory(CoroutineCallAdapterFactory())
            .addConverterFactory(GsonConverterFactory.create())
            .build()
            .create(CurrencyApi::class.java)
    }
}

活动:

 class MainActivity : AppCompatActivity(), AdapterView.OnItemSelectedListener {


override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val binding: ActivityMainBinding = DataBindingUtil.setContentView(this, R.layout.activity_main)
    val model = ViewModelProviders.of(this).get(MainViewModel::class.java)

    val apiService = CurrencyApi()

    GlobalScope.launch(Dispatchers.Main) {
        val currency = apiService.getCurrentCurrency("PLN", "EUR").await()
        return@launch try {
            text_view_test.text = currency.toString()
        } catch (e: Exception) {

        }
    }

Logcat:

  

E / Android运行时:致命异常:主要       流程:com.example.daniellachacz.currencyconverter,PID:10924       retrofit2.HttpException:HTTP 400           在com.jakewharton.retrofit2.adapter.kotlin.coroutines.CoroutineCallAdapterFactory $ BodyCallAdapter $ adapt $ 2.onResponse(CoroutineCallAdapterFactory.kt:104)           在retrofit2.OkHttpCall $ 1.onResponse(OkHttpCall.java:123)           在okhttp3.RealCall $ AsyncCall.execute(RealCall.java:153)           在okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)           在java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)           在java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:588)           在java.lang.Thread.run(Thread.java:818)

3 个答案:

答案 0 :(得分:2)

您收到服务器错误400 Bad Request响应。此状态代码表示服务器由于语法无效而无法理解该请求。尝试调试或放置一些日志,看看您真正发送到服务器的内容。我认为调试的好地方是实现Interceptor接口。

答案 1 :(得分:0)

正如@Sergey所说,这是服务器错误。

就我而言,它无法被API捕获,服务器写道:An internal server error occurred.(代码500)而不是JSON。

答案 2 :(得分:0)

@GET(currency)替换为@GET(currency.json)