Set elevation still display shadow below ActionBar in Android
<p>Inside <code>values/styles.xml</code> I have set  <code>&lt;item name="elevation"&gt;0dp&lt;/item&gt;</code> to my <code>AppTheme</code> style. and inside <code>values-21/styles.xml</code> I have set <code>&lt;item name="android:elevation"&gt;0dp&lt;/item&gt;</code> and I Have also try this
<code>&lt;item name="android:windowContentOverlay"&gt;@null&lt;/item&gt;</code>.I have also try to <code>Clean</code> the Project and <code>Rebuild</code> the Project. and also try to <code>Invalidate Caches and Restart</code>. But my Emulator still display shadow see the below screen.</p>

<p><strong>Question :</strong> </p>

<p>How to remove that shadow below to <code>ActionBar</code>.</p>

<p><strong>ScreenShot :</strong> </p>

<p><a href="https://i.stack.imgur.com/cmSpk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cmSpk.png" alt="enter image description here"></a></p>