As I understand it you are supposed to notify the media database of any new 
files you add using 
http://developer.android.com/reference/android/media/MediaScannerConnection.html.
 
Android itself will only update the media database automatically on boot. 

/Johan

Den torsdag 13 augusti 2015 kl. 01:09:03 UTC+2 skrev RLScott:

> This is a new problem with Lollipop only.  My app writes to external 
> memory by building a file path name from:
>
>   Environment.getExternalStorageDirectory().getAbsolutePath()
>
> But when I plug the USB into a desktop computer, the new file does not 
> show up in Explorer.  If I reboot the Lollipop Android tablet and try it 
> again, the file now shows up in Explorer on the desktop computer.  
> Furthermore, if the file already existed, then the version of the file that 
> Explorer sees is the new updated version, just as it should be.  Brand new 
> files do not show up until a reboot of Android.
>
> Also, this was not a problem with KitKat.  New files written by my app 
> showed up immediately on the USB-connected computer.
>
> Is there some way, in my app, to force new files to appear immediately to 
> the outside world?  I am writing to the root of the external memory.  This 
> is a side-loaded app, not a Market app, if that makes any difference.  It 
> has been working perfectly for 3 years, until this problem with Lollipop.
>
> -Robert Scott
>  Hopkins, MN
>
>

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