session-android/res/xml/mms_preferences.xml

<?xml version="1.0" encoding="utf-8"?>

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <CheckBoxPreference android:key="pref_enable_manual_mms"
                        android:defaultValue="false"
                        android:title="@string/preferences__enable_manual_mms"
                        android:summary="@string/preferences__override_system_mms_settings"/>

    <EditTextPreference android:key="pref_apn_mmsc_host"
                        android:title="@string/preferences__mmsc_url_required"
                        android:dependency="pref_enable_manual_mms"
                        android:inputType="textUri" />

    <EditTextPreference android:key="pref_apn_mms_proxy"
                        android:title="@string/preferences__mms_proxy_host_optional"
                        android:dependency="pref_enable_manual_mms"
                        android:inputType="textUri" />

    <EditTextPreference android:key="pref_apn_mms_proxy_port"
                        android:title="@string/preferences__mms_proxy_port_optional"
                        android:dependency="pref_enable_manual_mms"
                        android:inputType="number" />
</PreferenceScreen>