tests/HwAccelerationTest/res/drawable/gradient.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 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.
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<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <gradient
        android:startColor="#FF707070"
        android:endColor="#FF0C0C0C"
        android:angle="270" />
</shape>