<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="256dp"
android:height="256dp"
android:viewportHeight="70"
android:viewportWidth="70">
<path
android:name="heart1"
android:pathData="..."
android:strokeColor="#E91E63"
android:strokeWidth="1"/>
<path
android:name="heart2"
android:pathData="..."
android:strokeColor="#E91E63"
android:strokeWidth="1"/>
</vector>

<?xml version="1.0" encoding="utf-8"?>
<objectAnimator
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="6000"
android:propertyName="trimPathEnd"
android:valueFrom="0"
android:valueTo="1"
android:valueType="floatType"/>

<animated-vector
xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/v_heard">
<target
android:name="heart1"
android:animation="@animator/heart_animator"/>
<target
android:name="heart2"
android:animation="@animator/heart_animator"/>
...
</animated-vector>

// 只支持5.0以上.
private void animateImage() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
// 获取动画效果
AnimatedVectorDrawable mAnimatedVectorDrawable = (AnimatedVectorDrawable)
ContextCompat.getDrawable(getApplication(), R.drawable.v_heard_animation);
mIvImageView.setImageDrawable(mAnimatedVectorDrawable);
if (mAnimatedVectorDrawable != null) {
mAnimatedVectorDrawable.start();
}
}
}