Gadgetbridge/app/src/main/res/xml/preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <PreferenceCategory
        android:key="pref_key_general"
        android:title="@string/pref_header_general">
        <CheckBoxPreference
            android:defaultValue="false"
            android:key="general_autoconnectonbluetooth"
            android:title="@string/pref_title_general_autoconnectonbluetooth" />
    </PreferenceCategory>
    <PreferenceCategory
        android:key="pref_key_datetime"
        android:title="@string/pref_header_datetime">
        <CheckBoxPreference
            android:defaultValue="true"
            android:key="datetime_synconconnect"
            android:summary="@string/pref_summary_datetime_syctimeonconnect"
            android:title="@string/pref_title_datetime_syctimeonconnect" />
    </PreferenceCategory>
    <PreferenceCategory
        android:key="pref_key_notifications"
        android:title="@string/pref_header_notifications">

        <ListPreference
            android:defaultValue="when_screen_off"
            android:entries="@array/notification_mode"
            android:entryValues="@array/notification_mode_values"
            android:key="notification_mode_sms"
            android:title="@string/pref_title_notifications_sms" />

        <ListPreference
            android:defaultValue="when_screen_off"
            android:entries="@array/notification_mode"
            android:entryValues="@array/notification_mode_values"
            android:key="notification_mode_k9mail"
            android:title="@string/pref_title_notifications_k9mail" />

        <ListPreference
            android:defaultValue="when_screen_off"
            android:entries="@array/notification_mode"
            android:entryValues="@array/notification_mode_values"
            android:key="notification_mode_pebblemsg"
            android:summary="@string/pref_summary_notifications_pebblemsg"
            android:title="@string/pref_title_notifications_pebblemsg" />

        <Preference
            android:key="notifications_generic"
            android:title="@string/pref_title_notifications_generic" />

        <CheckBoxPreference
            android:defaultValue="false"
            android:key="notifications_generic_whenscreenon"
            android:title="@string/pref_title_whenscreenon" />
    </PreferenceCategory>

    <PreferenceCategory
        android:key="pref_key_device_specific_category"
        android:title="@string/preferences_category_device_specific_settings">
        <Preference
            android:key="pref_key_miband"
            android:icon="@drawable/ic_device_miband"
            android:title="@string/preferences_miband_settings" />
        <PreferenceScreen
            android:key="pref_key_pebble"
            android:icon="@drawable/ic_device_pebble"
            android:title="@string/pref_title_pebble_settings" >
            <PreferenceCategory
                android:key="pref_key_development"
                android:title="@string/pref_header_development">
                <CheckBoxPreference
                    android:defaultValue="false"
                    android:key="pebble_force_protocol"
                    android:title="@string/pref_title_pebble_forceprotocol"
                    android:summary="@string/pref_summary_pebble_forceprotocol" />
            </PreferenceCategory>
        </PreferenceScreen>
    </PreferenceCategory>

    <PreferenceCategory
        android:key="pref_key_development"
        android:title="@string/pref_header_development">
        <CheckBoxPreference
            android:defaultValue="false"
            android:key="log_to_file"
            android:title="@string/pref_write_logfiles" />
    </PreferenceCategory>
</PreferenceScreen>