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

<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/spinner_inner"
    android:pivotX="50%"
    android:pivotY="50%" 
    android:fromDegrees="0"
    android:toDegrees="360"
    android:interpolator="@android:anim/linear_interpolator"
    android:duration="1000"
    android:startOffset="0"/>