core/res/res/layout/time_picker_holo.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
**
** Copyright 2013, 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="wrap_content"
          android:layout_height="match_parent"
          android:orientation="vertical"
          android:focusable="true" >
    <include
            layout="@layout/time_header_label"
            android:layout_width="match_parent"
            android:layout_height="@dimen/timepicker_header_height"
            android:layout_gravity="center" />
    <android.widget.RadialTimePickerView
            android:id="@+id/radial_picker"
            android:layout_width="wrap_content"
            android:layout_height="@dimen/timepicker_radial_picker_dimen"
            android:layout_gravity="center"
            android:focusable="true"
            android:focusableInTouchMode="true" />
    <LinearLayout
            android:id="@+id/layout_buttons"
            style="?android:attr/buttonBarStyle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:divider="?android:attr/dividerHorizontal"
            android:showDividers="beginning">
        <Button
                android:id="@+id/done_button"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:minHeight="48dp"
                android:text="@string/done_label"
                android:textSize="@dimen/timepicker_done_label_size"
                style="?android:attr/buttonBarButtonStyle" />
    </LinearLayout>
</LinearLayout>