Creating RestInterface Class

BaseService.java

public final class BaseService {

  private BaseService() {
  }

  private static Builder getBuilder() {
    OkHttpClient client = new OkHttpClient();
    client.setConnectTimeout(BuildConfig.CONNECTION_TIMEOUT,
        TimeUnit.MILLISECONDS);
    client.setReadTimeout(BuildConfig.CONNECTION_TIMEOUT,
        TimeUnit.MILLISECONDS);
    client.setWriteTimeout(BuildConfig.CONNECTION_TIMEOUT,
        TimeUnit.MILLISECONDS);

    StethoUtil.addNetworkInterceptor(client);

    return new Builder()
        .setEndpoint(BuildConfig.REST_ENDPOINT)
        .setClient(new OkClient(client));
  }

  public static RestInterface getApi() {
    Gson gson = new GsonBuilder().create();

    return getBuilder().setConverter(new GsonConverter(gson))
        .build().create(RestInterface.class);
  }
}