[Volker]

Hi,

I use FileDialog to upload file on server and on Android file looks like “content://com.android.providers.media.documents/document/image%3A133” if I select an image. Is there an easy way to convert it to real file path in order to open file in C++ code?

Regards

Roman

[AlexFelgo Team]

Hi Volker,

are you referring to the Qt.labs FileDialog? https://doc.qt.io/qt-5/qml-qt-labs-platform-filedialog.html

The problem is that on Android this Qt component does not fully support all cases, and required persistance handling to re-access the file after fetching it using the dialog. This is also partly covered in this thread: https://forum.qt.io/topic/113328/how-to-convert-android-content-url-and-use-it-to-open-file

If this is only about images, did you try using the image picker method from the Felgo NativeUtils instead? https://felgo.com/doc/apps-howto-display-images-and-photos/#selecting-a-photo-from-the-gallery

Best,
Alex

[Volker]

Hi Alex,

yes, I’m using FileDialog and saw this post, but found suggested solutions too complicated for such simple case and I hoped Felgo has something that provide simple solution for this. Unfortunately I need the possibility to attach any file for transmission like mail application does it with attachments…

[AlexFelgo Team]

Hi Volker,

I would suggest to also ask this in the Qt forums directly, maybe there is another trick to it. We do not have a custom file picker for any file type on top of the Qt components at the moment.

Best,
Alex

[Volker]

Hi Alex,

starting from Qt 5.13 and beyond QFile can resolve/open content:// like URI on android:

https://www.volkerkrause.eu/2019/02/16/qt-open-files-on-android.html

I can read file selected with File Dialog and upload content. But the file name in “content://” is something like “msf%3A150” and not real file name (something.pdf in my example).  I found some possible solution via JNI call here

https://forum.qt.io/topic/116079/cant-get-the-correct-filepath-from-filedialog-in-android/6

but still wander why QFile cannot give me real file name if I have access to its content anyway…

[nks (baumemo)]

Is there an out of the box solution planned in Felgo?

[AlexFelgo Team]

Hi,

the Android file system by default is designed to give you single-use access to a file. Thus the FileDialog will request the file, and pass the content URI for temporary use. If you would like to get “permanent access”, the best thing is to store a copy of this file to the application data (e.g. using FileUtils). There are other ways with content resolvers to get permanent access to the file, but this is not being used by the Qt implentation of the FileDialog.

We will have a look if we can provide some helper here to make it easier to access the file type.

Best,
Alex

[nks (baumemo)]

Hi Alex,

thank you very much :).

Regards.