对于Retrofit 2.0.0-beta1或beta2，代码如下:

OkHttpClient client = new OkHttpClient();

client.setConnectTimeout(30, TimeUnit.SECONDS);
client.setReadTimeout(30, TimeUnit.SECONDS);
client.setWriteTimeout(30, TimeUnit.SECONDS);

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("http://api.yourapp.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .client(client)
    .build();

对于Retrofit:2.0.0-beta4，代码如下:

OkHttpClient client = new OkHttpClient.Builder()
    .addInterceptor(logging)
    .connectTimeout(30, TimeUnit.SECONDS)
    .readTimeout(30, TimeUnit.SECONDS)
    .writeTimeout(30, TimeUnit.SECONDS)
    .build();

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("http://api.yourapp.com/")
    .addConverterFactory(GsonConverterFactory.create())
    .client(client)
    .build();

现在已经变了。用.newBuilder()替换.Builder()

从okhttp:3.9.0开始，代码如下:

OkHttpClient okHttpClient = new OkHttpClient()
    .newBuilder()
    .connectTimeout(10,TimeUnit.SECONDS)
    .writeTimeout(10,TimeUnit.SECONDS)
    .readTimeout(30,TimeUnit.SECONDS)
    .build();

您可以设置调用超时来覆盖从解析DNS、连接、写入请求体、服务器处理到读取响应体的整个周期。

val client = OkHttpClient().newBuilder().callTimeout(CALL_TIMEOUT_IN_MINUTES, TimeUnit.MINUTES).build()

如果您想自定义配置，那么请使用下面的方法先创建OKhttpclient，然后在其之上添加构建器。

private final OkHttpClient client = new OkHttpClient();

// Copy to customize OkHttp for this request.
OkHttpClient client1 = client.newBuilder()
    .readTimeout(500, TimeUnit.MILLISECONDS)
    .build();
try (Response response = client1.newCall(request).execute()) {
    System.out.println("Response 1 succeeded: " + response);
} catch (IOException e) {
    System.out.println("Response 1 failed: " + e);
}

对于okhttp3，这有一点变化。

现在你使用构建器而不是setter来设置时间，就像这样:

OkHttpClient client = new OkHttpClient.Builder()
        .connectTimeout(10, TimeUnit.SECONDS)
        .writeTimeout(10, TimeUnit.SECONDS)
        .readTimeout(30, TimeUnit.SECONDS)
        .build();

更多信息可以在他们的维基上找到: https://github.com/square/okhttp/blob/b3dcb9b1871325248fba917458658628c44ce8a3/docs/recipes.md#timeouts-kt-java