Android Animated Vector Drawable cannot loop in xml

I want to set an Animated Vector Drawable to widget initial layout. The animation has many AnimationSet but it cannot set repeat together. It just can set repeat itself.

The following code animate the target vector "path1". I have 4 target but I cannot animate them together. They just can be repeat itself immediately.

I search a lot of answers. Much of them use listener to listener animationEnd callback. But I cannot set the callback to initial layout of widget.

ex.

<target android:name="path1">
    <aapt:attr name="android:animation">
        <set>
            <objectAnimator
                android:propertyName="fillAlpha"
                android:duration="100"
                android:valueFrom="0"
                android:valueTo="0"
                andoird:repeatCount="-1"
                android:valueType="floatType"
                android:interpolator="@android:interpolator/fast_out_slow_in"/>
            <objectAnimator
                android:propertyName="fillAlpha"
                android:startOffset="5000"
                android:duration="100"
                android:valueFrom="1"
                android:valueTo="1"
                android:valueType="floatType"
                android:interpolator="@android:interpolator/fast_out_slow_in"/>
        </set>
    </aapt:attr>
</target>