QFileDialog::getOpenFileName under Android does not let you pickup any file

When invoking QFileDialog::getOpenFileName under Android, the system dialog being shown only let's you pickup images, audios, downloaded files but it does not let you navigate the memory to pickup any file.

See openfile_qt.png to see how it looks like.

On the same device, when I open gmail app and ask to attach a file, here is how the dialog looks like (see openfile_nonqt.png). As you can see the left sidebar also proposes to access file manager apps available on the device, like "Astro", and through them the sd card can be browsed and any file can be picked up. It should be the same when using QFileDialog::getOpenFileName.