chinwag-android/app/src/main/res/xml/preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:key="@string/preferences_file_key">

    <PreferenceCategory android:title="@string/pref_title_notification_settings">

        <CheckBoxPreference
            android:key="notificationsEnabled"
            android:title="@string/pref_title_notifications_enabled"
            android:defaultValue="true" />

        <CheckBoxPreference
            android:dependency="notificationsEnabled"
            android:key="notificationAlertSound"
            android:title="@string/pref_title_notification_alert_sound"
            android:defaultValue="true" />

        <CheckBoxPreference
            android:dependency="notificationsEnabled"
            android:key="notificationStyleVibrate"
            android:title="@string/pref_title_notification_style_vibrate"
            android:defaultValue="true" />

        <CheckBoxPreference
            android:dependency="notificationsEnabled"
            android:key="notificationStyleLight"
            android:title="@string/pref_title_notification_style_light"
            android:defaultValue="true" />

    </PreferenceCategory>

    <PreferenceCategory android:title="@string/pref_title_appearance_settings">

        <CheckBoxPreference
            android:key="lightTheme"
            android:title="@string/pref_title_light_theme"
            android:defaultValue="false" />

    </PreferenceCategory>

</PreferenceScreen>