java/res/values/spinner-style.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
**
** Copyright 2014, 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.
*/
-->

<resources xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Until KitKat (API 19), {@link android.widget.Spinner} of dialog mode in a Dialog can't
         handle orientation change correctly. Using dropdown mode avoids the issue.
         This file is overridden by values-v19/spinner-style.xml on KitKat and up. -->
    <style name="additionalSubtypeSpinnerStyle">
        <item name="android:spinnerMode">dropdown</item>
    </style>
</resources>