Retrofit返回null，是否需要字符串？

Call<YourResponseObject> call = yourApiService.yourApiMethod();
call.enqueue(new Callback<YourResponseObject>() {
    @Override
    public void onResponse(Call<YourResponseObject> call, Response<YourResponseObject> response) {
        if (response.isSuccessful()) {
            YourResponseObject responseObject = response.body();
            if (responseObject == null) {
                String dataAsString = ""; // 将null转换为空字符串
                // 其他处理逻辑
            } else {
                // 处理非空数据
            }
        } else {
            // 处理网络请求失败的情况
        }
    }

    @Override
    public void onFailure(Call<YourResponseObject> call, Throwable t) {
        // 处理请求失败的情况
    }
});