LatinIME/java/res/layout/keyboard_popup_keyboard.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
**
** Copyright 2010, 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.
*/
-->
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:background="@drawable/keyboard_popup_panel_background"
        >
    <com.android.inputmethod.latin.LatinKeyboardBaseView
            xmlns:latin="http://schemas.android.com/apk/res/com.google.android.inputmethod.latin"
            android:id="@+id/LatinKeyboardBaseView"
            android:layout_alignParentBottom="true"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@android:color/transparent"

            latin:keyPreviewLayout="@layout/keyboard_key_preview"
            latin:popupLayout="@layout/keyboard_popup_keyboard"
            />
    <ImageButton android:id="@+id/closeButton"
        android:background="@android:color/transparent"
        android:src="@drawable/btn_close"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginLeft="8dp"
        android:clickable="true"
        />
</LinearLayout>