title: Why do we use drawable v24 in android?
body: <p>We have a drawable file already in drawable v21 also for ripple effect.
  So why we use drawable v24 when we are getting vector file already.</p>
  
  <p>Below is the xml File <strong>ic_launcher_foreground.xml</strong>.       </p>
  
  <pre><code>  &lt;vector xmlns:android="http://schemas.android.com/apk/res/android"
               xmlns:aapt="http://schemas.android.com/aapt"
               android:width="108dp"
               android:height="108dp"
               android:viewportHeight="108"
               android:viewportWidth="108"&gt;
          &lt;path
               android:fillType="evenOdd"
              android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
               android:strokeColor="#00000000"
               android:strokeWidth="1"&gt;
               &lt;aapt:attr name="android:fillColor"&gt;
                   &lt;gradient
                       android:endX="78.5885"
                       android:endY="90.9159"
                       android:startX="48.7653"
                       android:startY="61.0927"
                       android:type="linear"&gt;
                       &lt;item
                           android:color="#44000000"
                           android:offset="0.0"/&gt;
                       &lt;item
                          android:color="#00000000"
                           android:offset="1.0"/&gt;
                   &lt;/gradient&gt;
               &lt;/aapt:attr&gt;
           &lt;/path&gt;
           &lt;path
               android:fillColor="#FFFFFF"
               android:fillType="nonZero"
               android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11
   40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81
   70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76
   60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
               android:strokeColor="#00000000"
               android:strokeWidth="1"/&gt;
       &lt;/vector&gt;
  </code></pre>