[Interest] Sharing Files on Android

ekke ekke at ekkes-corner.org
Tue Nov 1 07:20:06 CET 2022

Am 01.11.22 um 02:33 schrieb Kyle Nusbaum via Interest:
> Hi everyone.
> I have a question about opening files using Qt on Android. 
> Specifically, I'm trying to open a pdf file that was downloaded 
> through my application.
> Supposedly I should be using QDesktopServices::openUrl 
> (https://doc.qt.io/qt-6/qdesktopservices.html#openUrl), which *sort* 
> of works, in that It opens a list of apps. When I select one, though, 
> it fails with:
> 10-31 20:24:39.631  9734  9734 E AndroidRuntime: 
> java.lang.RuntimeException: Unable to start activity 
> ComponentInfo{foundation.e.pdfviewer/com.gsnathan.pdfviewer.MainActivity_}: 
> java.lang.SecurityException: Permission Denial: opening provider 
> androidx.core.content.FileProvider from ProcessRecord{4283490 
> 9734:foundation.e.pdfviewer/u0a115} (pid=9734, uid=10115) that is not 
> exported from UID 10270
> I've had little success searching. It looks like I may need something 
> like Intent.FLAG_GRANT_READ_URI_PERMISSION, but can't find in the Qt 
> code where that would be used.
> Anyone have any experience using this function or otherwise using 
> Intents with Qt on Android?
> Thanks,
> -- Kyle

Hi Kyle,

five years ago I did some work on Sharing Text and Files with Qt Apps on 
Android and iOS. There's an example app: 
https://github.com/ekke/ekkesSHAREexample and a 4-part-Blog starting 
with this one: 

Don't know if all still works with newest Android SDK API Level, but 
perhaps you'll find some worthfully infos

next weeks / months I'll move from Qt 5.15 to Qt 6.5 and port all my 
apps and rework all my old examples and take a look how all of this will 
work best on Qt6 and blog again

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