Android: Find suitable folder for the app data and debugging

[Andy314]

Hello I am a beginner with Android.

I need a folder with the following feature.

1. accessable from outside (SMTB) -Windows Explorer - debugging - see log files etc.
2. Data should be persistent over the app deinstallation
3. Full access (read/write/create folder etc.) incl. access to a sqlite database for the app.

After hours of hours dicussion with chat-gpt and a lot of tests I found no working solution.

In the moment, I am in the
/storage/emulated/0/Download/AppName
path.

I can put data via Android-Studio in the path. The app can write f.e. my log-file but not access a sqlite database. After some tests I found via QFileInfo, that the DBfile is not readable
If have set the permission READ_EXTERNAL_STORAGE but this changes nothing.

What must I do ? How it get the permission ?
Has Android a better folder for this task ?

[Pl45m4]

@Andy314 said in Android: Find suitable folder for the app data and debugging:

After hours of hours dicussion with chat-gpt and a lot of tests I found no working solution.

I wonder why :D

/storage/emulated/0/Download/AppName

Why the Download folder?
storage/emulated is the internal flash memory of your phone (emulated "android" filesystem"). But I don't think "Download" is a suitable place there...

READ_EXTERNAL_STORAGE

I would say because the Download folder is not in external storage?!

[Andy314]

I figuered out:
The folder is not the problem, the App has full access to it. The problem are rights for the file(s).
If I copy a file via Android Studio, the app has no rights to read it.
Then I have packted the database-file in a resource of the exe and installed it during the app start in a folder. All works fine then.
But every reinstallation of the app removes all rights for the file.
I must activate "deinstall old application befor deployment", because without it I cannot switch between release and debug version.
Whats the common best practise for this problem ?