在V1.7.7版本上，下载中直接没有通知进度了，看进程还在的，就是没有进度也没有继续下载了，并且查询当前task是还在下载状态，

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1. What problem do you get?
下载中直接没有通知进度了，看进程还在的，就是没有进度也没有继续下载了，并且查询当前task是还在下载状态，
3. Which version of FileDownloader are you using when you produce such problem?
在V1.7.7版本上，
5. How to reproduce such problem?
这个不太清楚，有两个项目都使用了，另一个项目使用在不同的车机系统上的，就未出现这个问题
7. Do you set `FileDownloadLog.NEED_LOG=true`?
设置了的
9. Could you please reproduce this problem and provide all main process and `:filedownloader` process logcat
现在有的，没有使用多进程下载，使用的主进程
11. Can you fix it by yourself and request PR, if not, what's problem do you get when you try to fix it
没有任何报错信息，无法下手解决问题

Start by reproducing the stalled download on FileDownloader V1.7.7 in the main process, since the report provides no reproduction steps or source files. Enable FileDownloadLog.NEED_LOG and inspect the main-process logcat while checking the task state; done means identifying why progress stops and confirming that the download continues with progress notifications.

Written by the indexing model from the issue text.