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)
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)
将@GET(currency)
替换为@GET(currency.json)