在Kotlin:

首先，您应该创建一个OkHttp客户端并添加Retrofit构建器

fun create(): Retrofit { 

        val client = OkHttpClient.Builder()
            .readTimeout(60,TimeUnit.SECONDS)
            .build()


        return Retrofit.Builder()
            .baseUrl(BASE_URL)
            .client(client)
            .addConverterFactory(GsonConverterFactory.create())
            .build()
    }
}

这些答案对我来说已经过时了，所以这就是它是如何发挥作用的。

添加OkHttp，在我的情况下，版本是3.3.1:

compile 'com.squareup.okhttp3:okhttp:3.3.1'

然后在构建您的Retrofit之前，做以下工作:

OkHttpClient okHttpClient = new OkHttpClient().newBuilder()
    .connectTimeout(60, TimeUnit.SECONDS)
    .readTimeout(60, TimeUnit.SECONDS)
    .writeTimeout(60, TimeUnit.SECONDS)
    .build();
return new Retrofit.Builder()
    .baseUrl(baseUrl)
    .client(okHttpClient)
    .addConverterFactory(GsonConverterFactory.create())
    .build();

我使用Retrofit 1.9来获取XML。

public class ServicioConexionRetrofitXML {

    public static final String API_BASE_URL = new GestorPreferencias().getPreferencias().getHost();
    public static final long tiempoMaximoRespuestaSegundos = 60;
    public static final long tiempoMaximoLecturaSegundos = 100;
    public static final OkHttpClient clienteOkHttp = new OkHttpClient();


    private static RestAdapter.Builder builder = new RestAdapter.Builder().
            setEndpoint(API_BASE_URL).
            setClient(new OkClient(clienteOkHttp)).setConverter(new SimpleXMLConverter());


    public static <S> S createService(Class<S> serviceClass) {
        clienteOkHttp.setConnectTimeout(tiempoMaximoRespuestaSegundos, TimeUnit.SECONDS);
        clienteOkHttp.setReadTimeout(tiempoMaximoLecturaSegundos, TimeUnit.SECONDS);
        RestAdapter adapter = builder.build();
        return adapter.create(serviceClass);
    }

}

如果你使用的是Retrofit 1.9.0和okhttp 2.6.0，添加到你的Gradle文件中。

    compile 'com.squareup.retrofit:retrofit:1.9.0'
    compile 'com.squareup.okhttp:okhttp:2.6.0'
    // Librería de retrofit para XML converter (Simple) Se excluyen grupos para que no entre
    // en conflicto.
    compile('com.squareup.retrofit:converter-simplexml:1.9.0') {
        exclude group: 'xpp3', module: 'xpp3'
        exclude group: 'stax', module: 'stax-api'
        exclude group: 'stax', module: 'stax'
    }

注意:如果你需要获取JSON，只需从上面的代码中删除。

.setConverter(new SimpleXMLConverter())

我找到了这个例子

https://github.com/square/retrofit/issues/1557

这里我们在构建API rest服务实现之前设置自定义url客户端连接客户端。

import com.google.gson.Gson
import com.google.gson.GsonBuilder
import retrofit.Endpoint
import retrofit.RestAdapter
import retrofit.client.Request
import retrofit.client.UrlConnectionClient
import retrofit.converter.GsonConverter


class ClientBuilder {

    public static <T> T buildClient(final Class<T> client, final String serviceUrl) {
        Endpoint mCustomRetrofitEndpoint = new CustomRetrofitEndpoint()


        Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create()
        RestAdapter.Builder builder = new RestAdapter.Builder()
            .setEndpoint(mCustomRetrofitEndpoint)
            .setConverter(new GsonConverter(gson))
            .setClient(new MyUrlConnectionClient())
        RestAdapter restAdapter = builder.build()
        return restAdapter.create(client)
    }
}

 public final class MyUrlConnectionClient extends UrlConnectionClient {
        @Override
        protected HttpURLConnection openConnection(Request request) {
            HttpURLConnection connection = super.openConnection(request);
            connection.setConnectTimeout(15 * 1000);
            connection.setReadTimeout(30 * 1000);
            return connection;
        }
    }

public class ApiModule {
    public WebService apiService(Context context) {
        String mBaseUrl = context.getString(BuildConfig.DEBUG ? R.string.local_url : R.string.live_url);

        HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
        loggingInterceptor.setLevel(BuildConfig.DEBUG ? HttpLoggingInterceptor.Level.BODY : HttpLoggingInterceptor.Level.NONE);

        OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .readTimeout(120, TimeUnit.SECONDS)
                .writeTimeout(120, TimeUnit.SECONDS)
                .connectTimeout(120, TimeUnit.SECONDS)
                .addInterceptor(loggingInterceptor)
                //.addNetworkInterceptor(networkInterceptor)
                .build();

        return new Retrofit.Builder().baseUrl(mBaseUrl)
                .client(okHttpClient)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .build().create(WebService.class);

    }
}

在Kotlin中，您可以为retrofit2配置超时by

创建OkHttpClient对象(默认值为10秒)

val okHttpClient = OkHttpClient.Builder()
    .connectTimeout(30, TimeUnit.SECONDS)
    .writeTimeout(30, TimeUnit.SECONDS)
    .readTimeout(30, TimeUnit.SECONDS)
    .build()

然后将此对象添加到您的改造生成器中

val retrofit = Retrofit.Builder()
    .addConverterFactory(ScalarsConverterFactory.create())
    .client(okHttpClient)
    .baseUrl(BASE_URL)
    .build()

并从这个包中导入TimeUnit

import java.util.concurrent.TimeUnit