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()
    }
}

对于OkHttp3用户的Retrofit1.9，这里是解决方案，

.setClient(new Ok3Client(new OkHttpClient.Builder().readTimeout(60, TimeUnit.SECONDS).build()))

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

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;
        }
    }