改造有效，但回调不会调用成功或失败方法 - Android Fragment

Question

public void getApiCallToLoadData() {
    Log.e("test","in method");
    mService.getResponse().enqueue(new Callback<Example>() {
        @Override
        public void onResponse(Call<Example> call, Response<Example> response) {
            Log.e("test", "success");
            if(response.isSuccessful()) {
             //   mAdapter.updateAnswers(response.body().getItems());
                Log.e("AnswersPresenter", "posts loaded from API");
               mList = response.body().getVideoAPIResponse();
            }else {
                int statusCode  = response.code();
                // handle request errors depending on status code
            }
        }

        @Override
        public void onFailure(Call<Example> call, Throwable t) {
            showErrorMessage();
            Log.e("test", "error loading from API");

        }
    });

    Log.e("test","out method");
}

Api成功命中并且我在我的改装日志中得到了响应，但它没有调用onresponse或onfailure方法。需要帮助。