Using ObjectAnimator to display secondary progress bar

I'm using a progress bar where it has a gray color behind (primary process) and a blue color on top (secondary process). I used ObjectAnimator to give an animation in the progress bar when using only the primary, but now I can not make the secondary also use the animation. Follow the code:

Modification made in progress bar:

<item android:id="@android:id/progress">
    <shape
        android:innerRadiusRatio="2.5"
        android:shape="ring"
        android:thickness="10sp"
        android:useLevel="false">
        <gradient
            android:centerColor="#00A6FF"
            android:endColor="#00A6FF"
            android:startColor="#00A6FF"
            android:type="sweep"/>
    </shape>
</item>
<item android:id="@android:id/secondaryProgress">
    <shape
        android:innerRadiusRatio="2.5"
        android:shape="ring"
        android:thickness="10sp"
        android:useLevel="true">
        <gradient
            android:centerColor="@color/gray"
            android:endColor="@color/gray"
            android:startColor="@color/gray"
            android:type="sweep"/>
    </shape>
</item>

ObjectAnimator Method:

private void progressBar() {
    ObjectAnimator animation = ObjectAnimator.ofInt(progressBar, "progress", 0, 50);
    animation.setDuration(5000); // in milliseconds
    animation.setInterpolator(new DecelerateInterpolator());
    animation.start();
}