下载管理器发送STATUS_SUCCESSFUL失败的下载 [英] DownloadManager sends STATUS_SUCCESSFUL for failed download

问题描述

好吧，我下载文件（影像）。我想发一条消息，当地的URI图像时，下载完成。但是，20％的时间我得到这样的：

  6-01 18：46：39.900：信息/下载管理器（412）：发起请求下载605
06-01 18：46：39.910：警告/下载管理器（412）：中止请求下载605：试图恢复下载无法恢复
06-01 18：46：39.910：信息/ ololo（2826）：好吧，我会播出。
06-01 18：46：39.990：WARN / ImageView的（2826）：无法打开内容：内容：//下载/ my_downloads / 605
    java.io.FileNotFoundException：未找到的文件名。
    在android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:145)...
06-01 18：46：39.990：信息/的System.out（2826）：resolveUri没有坏的位图网址：内容：//下载/ my_downloads / 605
06-01 18：46：39.990：信息/ ololo（2826）：内容：//下载/ my_downloads / 605是为android.widget.ImageView@408a2cf0设置
 

下面是code

龙downloadId = downloadIds.get（本）; 如果（downloadId == intent.getLongExtra（DownloadManager.EXTRA_DOWNLOAD_ID，-1））{     DownloadManager.Query查询=新DownloadManager.Query（）;     query.setFilterById（downloadId）;     光标光标= downloadManager.query（查询）;     如果（cursor.moveToFirst（））{         开关（cursor.getInt（cursor.getColumnIndex（DownloadManager.COLUMN_STATUS）））{             案例DownloadManager.STATUS_SUCCESSFUL：{                 Log.i（ololo，好吧，我会播出。）;                 // 广播                 打破;             }             案例DownloadManager.STATUS_FAILED：{                 Log.i（ololo，坏了，我就不会播出。）;                 INT原因= cursor.getInt（cursor.getColumnIndex（DownloadManager.COLUMN_REASON））;                 如果（原因== DownloadManager.ERROR_CANNOT_RESUME ||原因== DownloadManager.ERROR_UNKNOWN）{                     //重新运行下载                 }                 打破;             }             默认：                 打破;         }     } }

解决方案

下载管理器是越野车，并不能正常工作。此bug已被提交给谷歌，而回：

HTTPS：//$c$c.google。 COM / P /安卓/问题/详细信息？ID = 18462

对于单文件下载，你可以通过指定一个唯一的目录解决此下载专门为这个目的，而只是采取任何你在DownloadManager.STATUS_SUCCESSFUL该目录中获得。
对于多文件下载，我想不出一个解决办法的那一刻，除非你有在源重命名文件的功能。

Okay, I'm downloading files (images). I want to send a message with local URI for the image when the download is completed. But 20% of time I'm getting this:

6-01 18:46:39.900: INFO/DownloadManager(412): Initiating request for download 605
06-01 18:46:39.910: WARN/DownloadManager(412): Aborting request for download 605: Trying to resume a download that can't be resumed
06-01 18:46:39.910: INFO/ololo(2826): Okay, I'll broadcast.
06-01 18:46:39.990: WARN/ImageView(2826): Unable to open content: content://downloads/my_downloads/605
    java.io.FileNotFoundException: No filename found.
    at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:145)...
06-01 18:46:39.990: INFO/System.out(2826): resolveUri failed on bad bitmap uri: content://downloads/my_downloads/605
06-01 18:46:39.990: INFO/ololo(2826): content://downloads/my_downloads/605 was set for android.widget.ImageView@408a2cf0

Here is the code

Long downloadId = downloadIds.get(this);

if(downloadId == intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1)) {
    DownloadManager.Query query = new DownloadManager.Query();
    query.setFilterById(downloadId);
    Cursor cursor = downloadManager.query(query);

    if(cursor.moveToFirst()) {

        switch (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))) {
            case DownloadManager.STATUS_SUCCESSFUL : {
                Log.i("ololo", "Okay, I'll broadcast.");
                // Broadcasting
                break;
            }
            case DownloadManager.STATUS_FAILED : {
                Log.i("ololo", "Bad, I won't broadcast.");
                int reason = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_REASON));
                if(reason == DownloadManager.ERROR_CANNOT_RESUME || reason == DownloadManager.ERROR_UNKNOWN) {
                    // Rerun download
                }
                break;
            }
            default:
                break;
        }
    }
}

解决方案

DownloadManager is buggy and doesn't work correctly. This bug was filed with Google a while back:

https://code.google.com/p/android/issues/detail?id=18462

For single file download, you could workaround this by specifying a unique directory to download to specifically for this purpose, and just take whatever you get in that directory upon DownloadManager.STATUS_SUCCESSFUL.
For multi-file downloads, I can't think of a workaround at the moment, unless you have the ability to rename files at the source.

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