core/res/res/layout/keyguard_screen_unlock_landscape.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
**
** Copyright 2008, 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 is the screen that shows the 9 circle unlock widget and instructs
     the user how to unlock their device, or make an emergency call.  This
     is the portrait layout.  -->

<com.android.internal.widget.LinearLayoutWithDefaultTouchRecepient xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:background="#FF000000"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
        >

    <!-- left side: instructions and emergency call button -->
    <LinearLayout
            android:orientation="vertical"
            android:layout_width="0dip"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            >

        <!-- lock icon next to header text -->
        <LinearLayout
                android:orientation="horizontal"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="3dip"
                android:gravity="center"
                >
            <ImageView android:id="@+id/unlockLockIcon"
                       android:layout_width="wrap_content"
                       android:layout_height="wrap_content"
                       android:layout_marginRight="3dip"
                       android:baselineAligned="true"
                       android:gravity="center"
                       android:src="@android:drawable/ic_lock_idle_lock"
                    />

            <TextView android:id="@+id/headerText"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:gravity="center"
                      android:textSize="18sp"/>
        </LinearLayout>


        <!-- fill space between header and button below -->
        <View
            android:layout_weight="1.0"
            android:layout_width="fill_parent"
            android:layout_height="0dip"
            />

        <!-- footer -->
        <FrameLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            >

            <!-- option 1: a single emergency call button -->
            <RelativeLayout android:id="@+id/footerNormal"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                >
                <Button android:id="@+id/emergencyCallAlone"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="@android:string/lockscreen_emergency_call"
                    android:textSize="14sp"
                    android:drawableLeft="@drawable/ic_emergency"
                    android:drawablePadding="3dip"
                    />
            </RelativeLayout>

            <!-- option 2: an emergency call button, and a 'forgot pattern?' button -->
            <LinearLayout android:id="@+id/footerForgotPattern"
                android:orientation="vertical"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                >
                <Button android:id="@+id/forgotPattern"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:textSize="14sp"
                    android:visibility="invisible"
                    />
                <Button android:id="@+id/emergencyCallTogether"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:text="@android:string/lockscreen_emergency_call"
                    android:textSize="14sp"
                    android:drawableLeft="@drawable/ic_emergency"
                    android:drawablePadding="3dip"
                    />
            </LinearLayout>
        </FrameLayout>
    </LinearLayout>

    <View
         android:background="@android:drawable/code_lock_left"
         android:layout_width="2dip"
         android:layout_height="fill_parent" />
    
    <!-- right side: lock pattern -->
    <com.android.internal.widget.LockPatternView android:id="@+id/lockPattern"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" />

</com.android.internal.widget.LinearLayoutWithDefaultTouchRecepient>