Question

我正在从URL下载视频，当我尝试获取进度显示负值时，在下面添加了我的代码，

byte[] buffer = new byte[1024];
int len1 = 0;
long total = 0;
while ((len1 = is.read(buffer)) != -1) {
    if (cancelDialogStatus) {
        break;
    }
    Log.e("System out", "doInBackground: progress:::" + len1);
    total += len1;
    // publishing the progress....
    // After this onProgressUpdate will be called
    int prg = (int) ((total * 100) / lenghtOfFile);
    Log.d("System out", "doInBackground: progress:::" + prg);
    if (prg > 100) {
        publishProgress(""
                + 100);
        fos.write(buffer, 0, len1);
        break;
    } else {
        publishProgress(""
                + (int) ((total * 100) / lenghtOfFile));
        fos.write(buffer, 0, len1);
    }
}

Answer 1

这基本上是由于服务器未设置Content-Length头参数。就像从Gdrive下载时一样，下载过程中不会显示总文件大小。

简单的答案是内容长度未知。更具体地说，服务器未在响应消息中设置 Content-Length 标头。

详细的解决方案是described here.

长度显示减号进度条

1 个答案: