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selectable_background.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.
-->

<!--
  This drawable is used as the main touch feedback drawable for the Action Bar. By default it is
  used as the action item button background, amongst other things.

The different items in this drawable are displayed when their selector state matches the view's
  state.
-->
<selector xmlns:android="http://schemas.android.com/apk/res/android">

</selector>