I have a question about Android file permissions in QT

[rhaps29]

Now, I am trying to make android mp3 application using qt

I wrote source code below.

QString path1 = "/storage/emulated/0";
QDirIterator it(path1, QStringList() << "*.mp3", QDir::Files, QDirIterator::Subdirectories);
while (it.hasNext()) {
    it.next();
    listWidget->addItem(it.fileName());
}

but It did not work. So I think that I need the file Permissions.

I tried what I can everythings.

I use source code below. It worked before one years ago but It did not work now.

bool checkPermission()
{
    auto r=    QtAndroidPrivate::checkPermission(QStringLiteral("android.permission.READ_EXTERNAL_STORAGE")).result();
    if (r == QtAndroidPrivate::Denied)
    {
        r = QtAndroidPrivate::checkPermission(QStringLiteral("android.permission.READ_EXTERNAL_STORAGE")).result();
        if (r == QtAndroidPrivate::Denied)
            return false;
    }
    return true;
}

*QStringLiteral("android.permission.READ_EXTERNAL_STORAGE") this part was QtAnroidPrivate::Storage. I edited my source code becuase QtAndroidPrivate::Storage is deprecated.

After a lot of research, I found an article that says that from Android 13 onwards, users doesn't need to request file permissions.

How to access external storage(sdcard/usb) in an android device in a qt qml based application?

and

QFileDialog::getOpenFileName(this, tr("Open File"), QDir::rootPath(), tr("Music (*.mp3)"));

The above source code works fine without file permissions.

I have a question, I would like to know why the code I wrote does not work.

QString path1 = "/storage/emulated/0";
QDirIterator it(path1, QStringList() << "*.mp3", QDir::Files, QDirIterator::Subdirectories);
while (it.hasNext()) {
    it.next();
    listWidget->addItem(it.fileName());
}

Please give me a hint. Thanks