avd_progress_indeterminate_horizontal.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="360dp"
      android:height="10dp"
      android:viewportHeight="10"
      android:viewportWidth="360">
      <group
        android:name="progress_group"
        android:translateX="180"
        android:translateY="5">
        <path
          android:name="background_track"
          android:fillAlpha="?android:attr/disabledAlpha"
          android:fillColor="?attr/colorControlActivated"
          android:pathData="M -180,-1 l 360,0 l 0,2 l -360,0 Z"/>
        <group
          android:name="rect2_grp"
          android:scaleX="0.1"
          android:translateX="-197.60001">
          <path
            android:name="rect2"
            android:fillColor="?attr/colorControlActivated"
            android:pathData="M -144,-1 l 288,0 l 0,2 l -288,0 Z"/>
        </group>
        <group
          android:name="rect1_grp"
          android:scaleX="0.1"
          android:translateX="-522.59998">
          <path
            android:name="rect1"
            android:fillColor="?attr/colorControlActivated"
            android:pathData="M -144,-1 l 288,0 l 0,2 l -288,0 Z"/>
        </group>
      </group>
    </vector>
  </aapt:attr>

  <target android:name="rect2_grp">
    <aapt:attr name="android:animation">
      <set>
        <objectAnimator
          android:duration="2000"
          android:pathData="M -197.60001,0 c 14.28182,0 85.07782,0 135.54689,0 c 54.26191,0 90.42461,0 168.24331,0 c 144.72154,0 316.40982,0 316.40982,0"
          android:propertyXName="translateX"
          android:repeatCount="infinite">
          <aapt:attr name="android:interpolator">
            <pathInterpolator
              android:pathData="M 0,0 C 0.0375,0 0.128764607715,0.0895380946618 0.25,0.218553507947 C 0.322410320025,0.295610602487 0.436666666667,0.417591408114 0.483333333333,0.489826169306 C 0.69,0.80972296795 0.793333333333,0.950016125212 1,1 "/>
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        </objectAnimator>
        <objectAnimator
          android:duration="2000"
          android:pathData="M 0,0.1 L 1,0.571379510698 L 2,0.909950256348 L 3,0.1"
          android:propertyYName="scaleX"
          android:repeatCount="infinite">
          <aapt:attr name="android:interpolator">
            <pathInterpolator
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          </aapt:attr>
        </objectAnimator>
      </set>

    </aapt:attr>
  </target>

  <target android:name="rect1_grp">
    <aapt:attr name="android:animation">
      <set>
        <objectAnimator
          android:duration="2000"
          android:pathData="M -522.59998,0 c 48.89972,0 166.02656,0 301.21729,0 c 197.58128,0 420.9827,0 420.9827,0"
          android:propertyXName="translateX"
          android:repeatCount="infinite">
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            <pathInterpolator
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        </objectAnimator>
        <objectAnimator
          android:duration="2000"
          android:pathData="M 0 0.1 L 1 0.826849212646 L 2 0.1"
          android:propertyYName="scaleX"
          android:repeatCount="infinite">
          <aapt:attr name="android:interpolator">
            <pathInterpolator
              android:pathData="M 0 0 L 0.3665 0 C 0.47252618112021,0.062409910275 0.61541608570164,0.5 0.68325,0.5 C 0.75475061236836,0.5 0.75725829093844,0.814510098964 1,1"/>
          </aapt:attr>
        </objectAnimator>
      </set>

    </aapt:attr>
  </target>

</animated-vector>