Edit: Now Holo Dark can now be selected with Qt 5.4 by adding android:theme="@android:style/Theme.Holo" to <application> in AndroidManifest.xml.
This works with Qt 5.4, but not with Qt 5.2, with Qt 5.2, the theme is always the default theme for the phone, regardless of what you specify for android:theme in the manifest.
So, in AndroidManifest.xml, find the <application> node and change it to:
<application android:theme="@android:style/Theme.Holo" ...
This is not currently available for QtQuickControls, although it has been ported to Qt 5.2 for QtWidgets.
The first is on the BogDan TODO list for 5.3. See his blog for more details:
Qt on Android Episode 1
Here you can find some screenshots from my friends system.
nonlocal

Native

QtCreator

lpapp source share