<resources><!-- Declare custom theme attributes that allow changing which styles are used for button bars depending on the API level. ?android:attr/buttonBarStyle is new as of API 11 so this is necessary to support previous API levels. --><declare-styleablename="ButtonBarContainerTheme"><attrname="metaButtonBarStyle"format="reference"/><attrname="metaButtonBarButtonStyle"format="reference"/></declare-styleable></resources>