tachiyomi/app/src/main/res/drawable/anim_caret_down.xml

<?xml version="1.0" encoding="utf-8"?>
<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:name="caret_up"
            android:width="24.0dip"
            android:height="24.0dip"
            android:viewportWidth="24.0"
            android:viewportHeight="24.0">
            <group
                android:name="caret01"
                android:rotation="90.0"
                android:translateX="12.0"
                android:translateY="15.0">
                <group
                    android:name="caret_l"
                    android:rotation="45.0">
                    <group
                        android:name="caret_l_pivot"
                        android:translateY="4.0">
                        <group
                            android:name="caret_l_rect_position"
                            android:translateY="-1.0">
                            <path
                                android:name="caret_l_rect"
                                android:fillColor="@android:color/black"
                                android:pathData="M -1.0,-4.0 l 2.0,0.0 c 0.0,0.0 0.0,0.0 0.0,0.0 l 0.0,8.0 c 0.0,0.0 0.0,0.0 0.0,0.0 l -2.0,0.0 c 0.0,0.0 0.0,0.0 0.0,0.0 l 0.0,-8.0 c 0.0,0.0 0.0,0.0 0.0,0.0 Z" />
                        </group>
                    </group>
                </group>
                <group
                    android:name="caret_r"
                    android:rotation="-45.0">
                    <group
                        android:name="caret_r_pivot"
                        android:translateY="-4.0">
                        <group
                            android:name="caret_r_rect_position"
                            android:translateY="1.0">
                            <path
                                android:name="caret_r_rect"
                                android:fillColor="@android:color/black"
                                android:pathData="M -1.0,-4.0 l 2.0,0.0 c 0.0,0.0 0.0,0.0 0.0,0.0 l 0.0,8.0 c 0.0,0.0 0.0,0.0 0.0,0.0 l -2.0,0.0 c 0.0,0.0 0.0,0.0 0.0,0.0 l 0.0,-8.0 c 0.0,0.0 0.0,0.0 0.0,0.0 Z" />
                        </group>
                    </group>
                </group>
            </group>
        </vector>
    </aapt:attr>

    <target android:name="caret01">
        <aapt:attr name="android:animation">
            <objectAnimator
                android:duration="300"
                android:interpolator="@android:interpolator/fast_out_slow_in"
                android:pathData="M 12.0,9.0 c 0.0,0.66667 0.0,5.0 0.0,6.0"
                android:propertyXName="translateX"
                android:propertyYName="translateY" />
        </aapt:attr>
    </target>
    <target android:name="caret_l">
        <aapt:attr name="android:animation">
            <objectAnimator
                android:duration="300"
                android:interpolator="@android:interpolator/fast_out_slow_in"
                android:propertyName="rotation"
                android:valueFrom="-45.0"
                android:valueTo="45.0"
                android:valueType="floatType" />
        </aapt:attr>
    </target>
    <target
        android:name="caret_r">
        <aapt:attr name="android:animation">
            <objectAnimator
                android:duration="300"
                android:interpolator="@android:interpolator/fast_out_slow_in"
                android:propertyName="rotation"
                android:valueFrom="45.0"
                android:valueTo="-45.0"
                android:valueType="floatType" />
        </aapt:attr>
    </target>
</animated-vector>