tests/res/drawable/gradientdrawable_radius_base.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
 * Copyright (C) 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.
-->

<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <gradient
        android:centerColor="#ffff0000"
        android:endColor="#0000ffff"
        android:gradientRadius="50%"
        android:startColor="#ffffffff"
        android:type="radial" />

    <corners android:radius="8px" />

    <padding
        android:bottom="10px"
        android:left="4px"
        android:right="6px"
        android:top="2px" />

    <size
        android:height="50px"
        android:width="50px" />

</shape>