res/xml/button_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<!--  Copyright (C) 2017 The OmniROM Project

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 -->
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:settings="http://schemas.android.com/apk/res/com.android.settings">

    <PreferenceCategory
        android:key="button_volume_keys"
        android:title="@string/button_volume_keys_title" >

        <org.omnirom.omnigears.preference.SystemSettingSwitchPreference
            android:key="swap_volume_buttons"
            android:title="@string/swap_volume_buttons_title"
            android:summary="@string/swap_volume_buttons_summary"
            android:defaultValue="false" />

        <org.omnirom.omnigears.preference.SystemSettingSwitchPreference
            android:key="volume_button_force_media"
            android:title="@string/volume_button_force_media_title"
            android:summary="@string/volume_button_force_media_summary"
            android:defaultValue="false" />

        <org.omnirom.omnigears.preference.SystemSettingSwitchPreference
            android:key="volume_button_wake"
            android:title="@string/button_volume_wake_title"
            android:summary="@string/button_volume_wake_summary"
            android:disableDependentsState="true"
            android:defaultValue="false" />

        <org.omnirom.omnigears.preference.SystemSettingSwitchPreference
            android:key="volume_button_music_control"
            android:title="@string/volume_button_music_control_title"
            android:summary="@string/volume_button_music_control_summary"
            android:dependency="volume_button_wake"/>
    </PreferenceCategory>

    <PreferenceCategory
        android:key="button_keys"
        android:title="@string/button_keys_title" >

        <SwitchPreference
            android:key="navigation_bar_show"
            android:title="@string/navigation_bar_show_title"
            android:summary="@string/navigation_bar_show_summary"
            android:persistent="false" />
        <SwitchPreference
            android:key="hardware_keys_disable"
            android:title="@string/hardware_keys_disable_title"
            android:summary="@string/hardware_keys_disable_summary"
            android:persistent="false"
            android:dependency="navigation_bar_show"/>
        <Preference
            android:key="button_brightness"
            android:title="@string/button_backlight_title"
            android:summary="@string/button_backlight_summary"
            android:persistent="false"
            android:fragment="org.omnirom.omnigears.ButtonBrightnessSettings" />

    </PreferenceCategory>

    <PreferenceCategory
        android:key="button_power"
        android:title="@string/global_actions_power_title" >

        <Preference
            android:key="global_actions"
            android:title="@string/global_actions_title"
            android:summary="@string/global_actions_summary"
            android:icon="@drawable/ic_settings_power"
            android:fragment="org.omnirom.omnigears.interfacesettings.GlobalActionsSettings" />
    </PreferenceCategory>

    <PreferenceCategory
        android:key="button_other"
        android:title="@string/button_other_title" >

        <ListPreference
            android:key="navbar_recents_style"
            android:title="@string/navbar_recents_style_title"
            android:entries="@array/navbar_recents_style_entries"
            android:entryValues="@array/navbar_recents_style_values"
            android:persistent="false"/>
        <ListPreference
            android:key="long_press_recents_action"
            android:title="@string/long_press_recents_action_title"
            android:entries="@array/long_press_recents_action_entries"
            android:entryValues="@array/long_press_recents_action_values"
            android:persistent="false"/>
        <ListPreference
            android:key="long_press_home_action"
            android:title="@string/long_press_home_action_title"
            android:entries="@array/long_press_home_action_entries"
            android:entryValues="@array/long_press_home_action_values"
            android:persistent="false"/>
    </PreferenceCategory>

</PreferenceScreen>