transdroid/core/res/drawable/loading_progress.xml

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >

	<item
		android:id="@android:id/progress"
		android:duration="100">
		<rotate
			android:drawable="@drawable/ic_empty_details"
			android:pivotX="50%"
			android:pivotY="50%" />
	</item>

</animation-list>