title: set Image(PNG etc) as an icon on drawer layout navigation items
body: <p>I'm setting the image as icon but its showing grey icon not the image,</p>
  
  <p>This <code>@drawable/image_second</code> is the image I want to use as icon.
  <a href="https://i.stack.imgur.com/6aSC5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6aSC5.png" alt="image_second.png"></a></p>
  
  <pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      tools:showIn="navigation_view"&gt;
  
      &lt;group android:checkableBehavior="single"&gt;
          &lt;item
              android:id="@+id/nav_home"
              android:icon="@drawable/image_second"
              android:title="@string/menu_home" /&gt;
          &lt;item
              android:id="@+id/nav_gallery"
              android:icon="@drawable/ic_menu_gallery"
              android:title="@string/menu_gallery" /&gt;
          &lt;item
              android:id="@+id/nav_slideshow"
              android:icon="@drawable/ic_menu_slideshow"
              android:title="@string/menu_slideshow" /&gt;
          &lt;item
              android:id="@+id/nav_tools"
              android:icon="@drawable/ic_menu_manage"
              android:title="@string/menu_tools" /&gt;
      &lt;/group&gt;
  
      &lt;item android:title="Communicate"&gt;
          &lt;menu&gt;
              &lt;item
                  android:id="@+id/nav_share"
                  android:icon="@drawable/ic_menu_share"
                  android:title="@string/menu_share" /&gt;
              &lt;item
                  android:id="@+id/nav_send"
                  android:icon="@drawable/ic_menu_send"
                  android:title="@string/menu_send" /&gt;
          &lt;/menu&gt;
      &lt;/item&gt;
  
  &lt;/menu&gt;
  </code></pre>
  
  <p>after running the code,I get this,
  <a href="https://i.stack.imgur.com/cNoXP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cNoXP.png" alt="enter image description here"></a></p>
  
  <p>please tell what to do and why its happening..</p>
  
  <p>As always thanks a lot..</p>