packages/SystemUI/res-keyguard/layout/keyguard_emergency_carrier_area.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
**
** Copyright 2012, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License")
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**     http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
-->

<!-- This contains emergency call button and carrier as shared by pin/pattern/password screens -->
<com.android.keyguard.EmergencyCarrierArea
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:androidprv="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:gravity="center"
    android:layout_gravity="center_horizontal"
    android:layout_alignParentBottom="true">

    <com.android.keyguard.CarrierText
        android:id="@+id/carrier_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        style="@style/Keyguard.TextView"
        android:singleLine="true"
        android:ellipsize="marquee"
        android:visibility="gone"
        android:gravity="center"
        androidprv:allCaps="@bool/kg_use_all_caps" />

    <com.android.keyguard.EmergencyButton
        android:id="@+id/emergency_call_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:layout_marginTop="@dimen/eca_overlap"
        android:text="@*android:string/lockscreen_emergency_call"
        style="@style/Keyguard.TextView.EmergencyButton"
        android:textAllCaps="@bool/kg_use_all_caps" />

</com.android.keyguard.EmergencyCarrierArea>