android holo 主题中有 Holo.ProgressBar.Large 样式:
<style name="Widget.Holo.ProgressBar.Large" parent="Widget.ProgressBar.Large">
<item name="android:indeterminateDrawable">@android:drawable/progress_large_holo</item>
</style>
有progress_large_holo.xml:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<rotate
android:drawable="@drawable/spinner_76_outer_holo"
android:pivotX="50%"
android:pivotY="50%"
android:fromDegrees="0"
android:toDegrees="1080" />
</item>
<item>
<rotate
android:drawable="@drawable/spinner_76_inner_holo"
android:pivotX="50%"
android:pivotY="50%"
android:fromDegrees="720"
android:toDegrees="0" />
</item>
为什么图层列表中有两个项目?