SpinnerAnimation

spinner

layout.xml:
    <ProgressBar
        android:id="@+id/pb_loading"
        style="@style/ListSpinner"
        android:layout_centerInParent="true" />



styles.xml:
    <style name="Spinner">
        <item name="android:indeterminate">true</item>
        <item name="android:indeterminateDrawable">@drawable/spinner</item>
        <item name="android:indeterminateDuration">2000</item>
        <item name="android:indeterminateOnly">true</item>
    </style>

    <style name="ListSpinner" parent="Spinner">
        <item name="android:layout_width">64dp</item>
        <item name="android:layout_height">64dp</item>
    </style>


drawable/spinner.xml:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:drawable="@drawable/spinner_inner"/>
    <item>
        <rotate
            android:fromDegrees="0"
            android:interpolator="@android:anim/linear_interpolator"
            android:pivotX="50%"
            android:pivotY="50%"
            android:toDegrees="360" >
            <bitmap
                android:antialias="true"
                android:filter="true"
                android:src="@drawable/spinner_outer" />
        </rotate>
    </item>
</layer-list>