avd_progress_indeterminate_circular.xml

<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="48dp"
      android:height="48dp"
      android:tint="?attr/colorControlActivated"
      android:viewportHeight="48"
      android:viewportWidth="48">
      <group
        android:name="progressBarContainer"
        android:translateX="24"
        android:translateY="24">
        <path
          android:name="progressBar"
          android:fillColor="@android:color/transparent"
          android:pathData="M0,0 m 0,-18 a 18,18 0 1,1 0,36 a 18,18 0 1,1 0,-36"
          android:strokeColor="@android:color/white"
          android:strokeLineCap="square"
          android:strokeLineJoin="miter"
          android:strokeWidth="4"
          android:trimPathEnd="0.03"
          android:trimPathOffset="0"
          android:trimPathStart="0"/>
      </group>
    </vector>
  </aapt:attr>

  <target android:name="progressBar">
    <aapt:attr name="android:animation">
      <set>
        <objectAnimator
          android:duration="1333"
          android:propertyName="trimPathStart"
          android:repeatCount="-1"
          android:valueFrom="0"
          android:valueTo="0.75"
          android:valueType="floatType">
          <aapt:attr name="android:interpolator">
            <pathInterpolator
              android:pathData="L0.5,0 C 0.7,0 0.6,1 1,1"/>
          </aapt:attr>
        </objectAnimator>
        <objectAnimator
          android:duration="1333"
          android:propertyName="trimPathEnd"
          android:repeatCount="-1"
          android:valueFrom="0.03"
          android:valueTo="0.78"
          android:valueType="floatType">
          <aapt:attr name="android:interpolator">
            <pathInterpolator
              android:pathData="C0.2,0 0.1,1 0.5,0.96 C 0.96666666666,0.96 0.99333333333,1 1,1"/>
          </aapt:attr>
        </objectAnimator>
        <objectAnimator
          android:duration="1333"
          android:interpolator="@android:anim/linear_interpolator"
          android:propertyName="trimPathOffset"
          android:repeatCount="-1"
          android:valueFrom="0"
          android:valueTo="0.25"
          android:valueType="floatType"/>
      </set>
    </aapt:attr>
  </target>

  <target android:name="progressBarContainer">
    <aapt:attr name="android:animation">
      <objectAnimator
        android:duration="4444"
        android:interpolator="@android:anim/linear_interpolator"
        android:propertyName="rotation"
        android:repeatCount="-1"
        android:valueFrom="0"
        android:valueTo="720"
        android:valueType="floatType"/>
    </aapt:attr>
  </target>

</animated-vector>