I have not found in the forum anything similar to what happens to me.
I use the extension of @Taifun File
I get the list of files in a folder.
For each element of the list I get the path.
That path I put it to the source player.
In the companion it works perfect and the music of the file in the folder is played.
Now I create the apk and test it on the phone and the app closes.
@Taifun you know what could be happening?
Is there any other way to get the path of a file knowing only its name?