Do you actually need to check if the permission is already granted ?
Just put it in the Screen1.AskForPermission() in the Screen1.Initialize event.
It will ask for the permission only if the app does not have the permission.
This will help in the following ways :-
I knew I was going to mess that up. The only way I get any files listed in Music Titles 4 is to have get global APK = true set when using companion. It does play the file but get a notice that it can't find the cue sheet.
Hi Anke
All media is put on the device by the User, and the amount will grow overtime. Most times, the media is going to be directly transferred from a PC, via a card or USB.
The App plays the music and displays the cue sheet, it does not supply any media.
The interpretation of what media actually is certainly seems to depend on Industry. One of daughters is in the film industry and as far as they are concerned, HTML and PDF are media. Google seem to have a different point of view 
There has to be a way to move onto the next part of the process. The best way is to use a Procedure to start the next stage, which I have not done, but this is a test snippet where the primary concern is to get the media loaded and running.
Hi Richard
I'm wondering if we would be more successful if the files were in the Android Documents folder.
That should not happen. I will edit the snippet.
Hi Richard - MusicTitles5
Code changes:
Works perfectly here!
MusicTitles5.aia (43.1 KB)
In companion
Files mp3 and html are in folder Documents/PlayMusic
To access (read) a non-media file (like HTML) from one of the Shared folders (like /Documents/PlayMusic) on Android 11+ it must have been created by the app itself.
However, on Android < 11 it should work.
If the app has granted
MANAGE_EXTERNAL_STORAGEpermission it should work on all Android versions.
... but Google are unlikely to allow the App to be distributed via Google Play.
I think TaifunFile may be setting ACTION_OPEN_DOCUMENT_TREE?
Hi Richard - you are missing the point about the APK setting. It should only be true if the App is running as an APK. It should only be false if the App is running via the Companion. See my screenshot, that's the App running as an APK - the Label telling us that is totally reliant on the manual setting of the APK variable, in this case set to True.
Run as an APK
Run via the Companion
I read recently that later this year Google will be putting another potential spanner in the works by releasing Android 12b specifically for tablets 
Edit: It is running perfectly in Android 10 here 
Edit: The accumulated cache data of an app can cause it to stop working. When such a thing happens, we need to reset the cache data from the device settings. So, if individual Android apps are not working on your phone, another solution to fix it is by clearing the app's cached data. I don't think this is the cause of the issue you see, but there is no harm in clearing the cache.
I think he is aware of this:
So why do think the snippet works on Android 11 but not on Android 10? (Probably not on Android 9 either, Richard has a v9 device to test on too).
The snippet is not using allfilespermission.aix, only the latest version 14a of TaifunFile.aix.
Something interesting - my phone is running Android 11 and nagging me to update to Android 12, but GetApiLevel_3.aix returns API 29, Android Version 10. 
Edit: This because Huawei have hoax Android versions built on top of the Android 10 open source. They are still banned from Google upgrades by the USA government.
Listing MP3s from the removable (micro) DS card:
And after listing MP3s from /Documents/PlayMusic/
This works without MANAGE_EXTERNAL_STORAGE permission on all Android version < 11, but on Android 11+ only wth MANAGE_EXTERNAL_STORAGE permission (or the app must use SAF).
Where do the HTML files come from? Who created these?
I like the Gipsy Kings 
So effectively you have both mp3 and html files in /Documents/PlayMusic and it does work, as per my setup.
Listing files from microSD is not really useful as some 'newer' Tablets do not have a card slot.
If you open the sample, they were created by Richard on a PC with Serif WebPlus8 - so essentially HTML4, fixed dimensions. I have modified Richard's sample so that it is responsive.
Well, my Android 11 phone (Huawei P30 Pro), which is actually my daughters, borrowed on a non-return basis, is actually Android 10 (Hoax Android 11)! - so that explains why the snippet is working. It should also mean it would work on Richard's Android 10 devices......
Ok, but what user would go to the trouble of creating HTML files like this for all MP3s (and I have thousands of them)? I definitely don't. So this is far from a viable solution (approach).
Well, if there isn't one, none will be listed. So where should the problem be?
Firstly, it can be done by basically filling in a form, and that form is then used to generate an HTML automatically (Desktop program). I assume that cue data is readily available for popular recordings so it could be a conversion or copy and paste exercise.
https://dtccuesheets.tripod.com/id1.html
What kind of User? An Amateur DJ Enthusiast - there are thousands of them in the UK and I'm sure many more than that in the USA.
Edit: Dance Moves.
Edit: Probably hundreds of files rather than thousands if it's about dance moves? I think Richard can explain better.
