smartvod/app/src/main/res/xml/root_preferences.xml

<PreferenceScreen xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <PreferenceCategory app:title="Settings">

        <Preference
            app:key="wifi_settings"
            app:title="WIFI Settings"
            />
        <Preference
            app:key="seat_settings"
            app:title="SeatNum Settings"
            />
        <SwitchPreference
            app:key="ads_control"
            app:title="Ads Control"
            />
        <SwitchPreference
            app:key="screen_control"
            app:title="Screen Control"
            />
<!--        <EditTextPreference-->
<!--            app:key="Password"-->
<!--            app:title="Password"-->
<!--            app:useSimpleSummaryProvider="true"-->
<!--            android:inputType="numberDecimal"-->
<!--            android:digits="0123456789"-->
<!--            app:summary="123456"/>-->
<!--        <EditTextPreference-->
<!--            app:key="Welcome"-->
<!--            app:title="Welcome"-->
<!--            app:useSimpleSummaryProvider="true"-->
<!--            app:summary="Welcome to vod"/>-->
    </PreferenceCategory>
</PreferenceScreen>