Quelle  preference_chat.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:key="pref_key_chatdisplay"
    android:title="@string/prefs_chatdisplay"
    android:summary="@string/prefs_sum_chatdisplay"
    android:persistent="true">

    <PreferenceCategory
        android:title="@string/prefs_header_keyboard"
        android:key="pref_key_keyboard">
        <CheckBoxPreference
            android:widgetLayout="@layout/preference_switch_layout"
            android:key="@string/preferences__enter_to_send"
            android:summaryOff="@string/prefs_sum_enter_off"
            android:summaryOn="@string/prefs_sum_enter_on"
            android:title="@string/prefs_title_enter"
            android:icon="@drawable/ic_send_circle_outline"
            android:defaultValue="false" />
    </PreferenceCategory>

    <PreferenceCategory
        android:title="@string/media"
        android:key="pref_key_player">
        <CheckBoxPreference
            android:widgetLayout="@layout/preference_switch_layout"
            android:key="@string/preferences__gif_autoplay"
            android:title="@string/prefs_gif_autoplay"
            android:icon="@drawable/ic_outline_play_circle_24"
            android:defaultValue="true" />

        <CheckBoxPreference
            android:widgetLayout="@layout/preference_switch_layout"
            android:key="@string/preferences__proximity_sensor"
            android:title="@string/prefs_proximity_sensor"
            android:summary="@string/prefs_proximity_sensor_explain"
            android:defaultValue="true" />

        <CheckBoxPreference
            android:widgetLayout="@layout/preference_switch_layout"
            android:key="@string/preferences__image_attach_previews"
            android:summary="@string/prefs_sum_image_attach_previews"
            android:title="@string/prefs_title_image_attach_previews"
            android:icon="@drawable/ic_outline_library_add_24"
            android:defaultValue="true" />
    </PreferenceCategory>

</PreferenceScreen>