DownloadManager名称，重新下载的文件

我使用DownloadManager下载文件并从DownloadManager.COLUMN_LOCAL_URI获取其名称。下载相同的文件超过11次。 11次开始奇怪的名字。例如：DownloadManager名称，重新下载的文件

的text.txt

文本1.txt的

文本2.txt

文本3.txt

文本4.txt

文本-5.txt

text-6.txt

文本7.txt

文本8.txt

文本9.txt

文本10.txt

文本26.txt

文本的14.txt

可能是什么问题？

预先感谢您

编辑：

把我的代码

public static long downloadFile(Context ctx, String url, String title, String description, String filename, String mimetype, BroadcastReceiver onDownloadComplete) { 
     DownloadManager dm = (DownloadManager) ctx.getSystemService(Context.DOWNLOAD_SERVICE); 

     Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).mkdirs(); 
     long res = dm.enqueue(new DownloadManager.Request(Uri.parse(url)).setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI).setAllowedOverRoaming(false).setTitle(title).setMimeType(mimetype).setDescription(description).setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, filename)); 
     ctx.registerReceiver(onDownloadComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)); 
     Toster.showGreenToast(ctx, ctx.getString(R.string.download_started, filename)); 
     return res; 
    } 

    public static String getDownloadCompletedFileName(Context ctx, Intent intent) { 
     String res = ""; 

     try { 
      Bundle extras = intent.getExtras(); 
      DownloadManager dm = (DownloadManager) ctx.getSystemService(Context.DOWNLOAD_SERVICE); 

      DownloadManager.Query q = new DownloadManager.Query(); 
      q.setFilterById(extras.getLong(DownloadManager.EXTRA_DOWNLOAD_ID)); 
      Cursor c = dm.query(q); 

      if (c.moveToFirst()) { 
       int status = c.getInt(c.getColumnIndex(DownloadManager.COLUMN_STATUS)); 
       if (status == DownloadManager.STATUS_SUCCESSFUL) { 
        // process download 
        res = c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI)); 
        // get other required data by changing the constant passed to getColumnIndex 
       } 
      } 

      c.close(); 
     } catch (Exception e) {} 

     return res; 
    }

来源

2013-12-08 Orgazm pionerki

你还没有告诉我们你是如何生成文件名的。 –