I am using Qt 5.12.3 to make a native file browser for android, using QFileSystemModel. Here is the code that i used :

dir_model=new QFileSystemModel(this);
dir_liste=new QTreeView(this);
dir_model->setRootPath(QDir::rootPath());
dir_liste->setModel(dir_model);

I add permission "android.permission.READ_EXTERNAL_STORAGE" and "android.permission.WRITE_EXTERNAL_STORAGE" to the AndroidManifest.xml file.

Also i add manual permission : Settings-> apps -> permissions -> storage, for my android app.

When i run my app i get an empty :/ directory as in the image below, with the output message :
E libFileDialog.so: inotify_add_watch(/) failed: (Permission denied)

An other file browser application work fine (picture below) after enabling acces.

Is there a way to allow acces permission for the QFileSystemModel to show the storage memory contents ?