An example of the Android xml bundle format for creating an AnimatedVectorDrawable. See https://plus.google.com/+NickButcher/posts/A8KKxnJdg4r
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright 2016 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<animated-vector
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:aapt="http://schemas.android.com/aapt">
<aapt:attr name="android:drawable">
<vector
android:width="24dp"
android:height="24dp"
android:viewportWidth="24"
android:viewportHeight="24">
<path
android:name="root"
android:strokeWidth="2"
android:strokeLineCap="square"
android:strokeColor="?android:colorControlNormal"
android:pathData="M4.8,13.4 L9,17.6 M10.4,16.2 L19.6,7" />
</vector>
</aapt:attr>
<target android:name="root">
<aapt:attr name="android:animation">
<objectAnimator
android:propertyName="pathData"
android:valueFrom="M4.8,13.4 L9,17.6 M10.4,16.2 L19.6,7"
android:valueTo="M6.4,6.4 L17.6,17.6 M6.4,17.6 L17.6,6.4"
android:duration="300"
android:interpolator="@android:interpolator/fast_out_slow_in"
android:valueType="pathType" />
</aapt:attr>
</target>
</animated-vector>