loadTheme - multiple declarations
Function loadTheme
load theme from XML document
Sample
<?xml version="1.0" encoding="utf-8"?>
<theme id="theme_custom" parent="theme_default">
<style id="BUTTON"
backgroundImageId="btn_background"
>
</style>
</theme>
Function loadTheme
load theme from file
Function loadTheme
load theme from XML file (null if failed)