<?xml version="1.0" encoding="utf-8"?>

<rotate xmlns:android="http://schemas.android.com/apk/res/android"
        android:fromDegrees="0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="1"
        android:toDegrees="360" >

    <shape
        android:innerRadiusRatio="2.5"
        android:shape="ring"
        android:thicknessRatio="18"
        android:useLevel="false" >
        <gradient
            android:centerColor="#a0a0a0a0"
            android:centerY="0.5"
            android:endColor="#f0f0f0"
            android:startColor="#40404040"
            android:type="sweep"/>
    </shape>

</rotate>