您可以按如下方式提供以秒为单位的时间
公共类ApiClient{

public static final String BASE_URL = "your_url";
public static Retrofit retrofit = null;

public static Retrofit getApiClient() {
    if (retrofit == null) {
        OkHttpClient okHttpClient = new OkHttpClient().newBuilder()
                .connectTimeout(60, TimeUnit.SECONDS)
                .readTimeout(60, TimeUnit.SECONDS)
                .writeTimeout(60, TimeUnit.SECONDS)
                .build();
        return new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .client(okHttpClient)
                .addConverterFactory(GsonConverterFactory.create())
                .build();


    }

        return retrofit;
}

}

我已经给了60秒