unity3d - 如何在android中显示任何文件类型的统一UI滑块填充unitywebrequest downloadProgress？

Question

（抱歉英语不好）嗨，我正在使用此代码通过 unitywebrequest 下载assetbundle 或 .mp4 文件：

public IEnumerator Download (List<string> urls) {

        for (int i = 0; i < urls.Count; i++) {
            
            string ext = Path.GetExtension (urls[i]);
            
            if (ext == ".mp4") {
                 uwr = UnityWebRequest.Get (urls[i]);
            }
            if(ext == ".unity3d") {
                 uwr = UnityWebRequestAssetBundle.GetAssetBundle(urls[i]);
            }
            
            
            string fileName = Path.GetFileName (urls[i]);
            
            string path = Path.Combine (myFolder + "/" + fileName);
            uwr.downloadHandler = new DownloadHandlerFile (path);
            
            
            StartCoroutine (ShowDownloadProgress (uwr)); // Progress Bar With Unity Slider
            
            yield return uwr.SendWebRequest ();
            
            if (uwr.isNetworkError || uwr.isHttpError) {
                print ("Error");
            }
            else {
                print ("File successfully downloaded and saved to " + path);
            }           
        }
}

并使用此代码通过统一滑块显示下载进度：

public IEnumerator ShowDownloadProgress (UnityWebRequest www) {
    while (!www.isDone) {
        downloadProgressSlider.value = www.downloadProgress;
        downloadProgressTxt.text = (string.Format ("{0:0%}", www.downloadProgress));
        yield return new WaitForSeconds (.01f);
    }
    downloadProgressSlider.value = 0;
}

当代码下载任何文件类型时，统一编辑器中的一切都很好，我可以看到滑块值发生变化并填充它：

但是我的导出 .apk 有不同的结果，它仅在应用程序下载 .mp4 文件时显示填充滑块，但对于 .xml、.unity3d 等其他文件类型，每个文件的值都跳到结尾！