Font variations.

resources/android_fonts/v22/fonts.xml

 <?xml version="1.0" encoding="utf-8"?>
 <familyset version="21">
     <!-- first font is default -->
     <family name="sans-serif">
         <font weight="100" style="normal">
             Roboto-Thin.ttf
         </font>
         <font weight="100" style="italic">Roboto-ThinItalic.ttf</font>
         <font weight="300" style="normal">Roboto-Light.ttf</font>
         <font weight="300" style="italic">Roboto-LightItalic.ttf</font>
         <font weight="400" style="normal">Roboto-Regular.ttf</font>
         <font weight="400" style="italic">Roboto-Italic.ttf</font>
         <font weight="500" style="normal">Roboto-Medium.ttf</font>
         <font weight="500" style="italic">Roboto-MediumItalic.ttf</font>
         <font weight="700" style="normal">Roboto-Bold.ttf</font>
         <font weight="700" style="italic">Roboto-BoldItalic.ttf</font>
         <font weight="900" style="normal">Roboto-Black.ttf</font>
         <font weight="900" style="italic">Roboto-BlackItalic.ttf</font>
     </family>
     <alias name="sans-serif-thin" to="sans-serif" weight="100" />
     <alias name="sans-serif-light" to="sans-serif" weight="300" />
     <alias name="sans-serif-black" to="sans-serif" weight="900" />
     <alias name="arial" to="sans-serif" />
     <alias name="helvetica" to="sans-serif" />
     <alias name="tahoma" to="sans-serif" />
     <alias name="verdana" to="sans-serif" />
 
+    <family name="var">
+        <font weight="100" style="normal"><axis tag="wght" stylevalue="0.5"/>Distortable.ttf</font>
+        <font weight="200" style="normal"><axis tag="wght" stylevalue="0.65"/>Distortable.ttf</font>
+        <font weight="300" style="normal"><axis tag="wght" stylevalue="0.85"/>Distortable.ttf</font>
+        <font weight="400" style="normal"><axis tag="wght" stylevalue="1.0"/>Distortable.ttf</font>
+        <font weight="500" style="normal"><axis tag="wght" stylevalue="1.2"/>Distortable.ttf</font>
+        <font weight="600" style="normal"><axis tag="wght" stylevalue="1.4"/>Distortable.ttf</font>
+        <font weight="700" style="normal"><axis tag="wght" stylevalue="1.6"/>Distortable.ttf</font>
+        <font weight="800" style="normal"><axis tag="wght" stylevalue="1.8"/>Distortable.ttf</font>
+        <font weight="900" style="normal"><axis tag="wght" stylevalue="2.0"/>Distortable.ttf</font>
+    </family>
+
     <family name="sans-serif-condensed">
         <font weight="300" style="normal">RobotoCondensed-Light.ttf</font>
         <font weight="300" style="italic">RobotoCondensed-LightItalic.ttf</font>
         <font weight="400" style="normal">RobotoCondensed-Regular.ttf</font>
         <font weight="400" style="italic">RobotoCondensed-Italic.ttf</font>
         <font weight="700" style="normal">RobotoCondensed-Bold.ttf</font>
         <font weight="700" style="italic">RobotoCondensed-BoldItalic.ttf</font>
     </family>
     <alias name="sans-serif-condensed-light" to="sans-serif-condensed" weight="300" />
 
@@ skipping 187 matching lines @@
     <family>
         <font weight="400" style="normal">NotoSansSymbols-Regular-Subsetted.ttf</font>
     </family>
     <family>
         <font weight="400" style="normal">NotoColorEmoji.ttf</font>
     </family>
     <family lang="ja">
         <font weight="400" style="normal">MTLmr3m.ttf</font>
     </family>
 </familyset>