preferences.xml

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

    <PreferenceCategory
        android:title="@string/settings_category_title_server"
        android:key="@string/settings_key_title_server">

        <EditTextPreference
            android:key="@string/settings_key_server_address"
            android:summary="@string/settings_summary_server_address"
            android:inputType="textUri"
            android:hint="@string/settings_hint_server_address" />

    </PreferenceCategory>

    <PreferenceCategory
        android:title="@string/settings_category_title_app"
        android:key="@string/settings_key_title_server">

        <SwitchPreference
            android:key="@string/settings_key_notification_enable"
            android:summary="@string/settings_summary_app_notification"
            android:defaultValue="true" />

    </PreferenceCategory>
</PreferenceScreen>