Quelle  preference_security.xml

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

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    android:key="pref_key_security"
    android:title="@string/prefs_security"
    android:persistent="true">

    <PreferenceCategory
        android:title="@string/prefs_title_access_protection"
        android:key="pref_key_pin">

        <DropDownPreference
            android:key="@string/preferences__lock_mechanism"
            android:title="@string/prefs_title_locking_mechanism"
            android:icon="@drawable/ic_screen_lock_outline"
            android:summary="@string/lock_option_none"
            android:entries="@array/list_lock_options"
            android:entryValues="@array/list_lock_options_values"
            android:defaultValue="none" />

        <Preference
            android:key="@string/preferences__pin_lock_code"
            android:title="@string/prefs_title_pin_code"
            android:defaultValue="" />

        <CheckBoxPreference
            android:key="@string/preferences__lock_ui_switch"
            android:widgetLayout="@layout/preference_switch_layout"
            android:title="@string/prefs_title_pin_switch"
            android:summary="@string/prefs_sum_security_pin"
            android:defaultValue="false" />

        <DropDownPreference
            android:key="@string/preferences__pin_lock_grace_time"
            android:summary="@string/prefs_sum_pin_grace"
            android:title="@string/prefs_pin_grace"
            android:icon="@drawable/ic_timer_outline"
            android:entries="@array/list_pin_grace_time"
            android:entryValues="@array/list_pin_grace_time_values"
            android:dependency="@string/preferences__lock_ui_switch"
            android:defaultValue="-1" />

    </PreferenceCategory>

    <PreferenceCategory
        android:title="@string/prefs_masterkey"
        android:key="pref_key_masterkey">

        <CheckBoxPreference
            android:widgetLayout="@layout/preference_switch_layout"
            android:key="@string/preferences__masterkey_switch"
            android:title="@string/prefs_title_masterkey_passphrase"
            android:summary="@string/prefs_sum_passphrase"
            android:icon="@drawable/ic_key_outline"
            android:defaultValue="false" />
        <Preference
            android:key="@string/preferences__masterkey_passphrase"
            android:summary="@string/prefs_masterkey_passphrase"
            android:title="@string/prefs_title_masterkey_change_passphrase"
            android:dependency="@string/preferences__masterkey_switch"
            android:defaultValue="" />
        <CheckBoxPreference
            android:widgetLayout="@layout/preference_switch_layout"
            android:key="@string/preferences__masterkey_notification_newmsg"
            android:summaryOff="@string/prefs_masterkey_notification_newmsg_off"
            android:summaryOn="@string/prefs_masterkey_notification_newmsg_on"
            android:title="@string/prefs_title_masterkey_notification_newmsg"
            android:dependency="@string/preferences__masterkey_switch"
            android:defaultValue="true" />

    </PreferenceCategory>
</PreferenceScreen>