Custom background color does not cover whole background

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http://stackoverflow.com – I've written a simple custom style in xml: <?xml version="1.0" encoding="utf-8"?> <resources> <style name="Light"> <item name="android:textColor">@color/text_light</item> <item name="android:background">@color/background_light</item> </style> </resources> However, when I apply it, the text color is correctly set for every element of the view, whereas the background color is not set for the whole screen, but only for the single views inside it (for example listviews, textviews, buttons). This is the code I use to (HowTos)