<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto">
<PreferenceCategory app:title="@string/theme_header">
<ListPreference
app:defaultValue="@string/default_theme"
app:entries="@array/theme_entries"
app:entryValues="@array/theme_values"
app:key="theme"
app:title="@string/theme_title"
app:useSimpleSummaryProvider="true" />
</PreferenceCategory>
</PreferenceScreen>