title: how to remove shadow below actionbar with AppCompat.Light.NoActionBar?
body: <p>I tried to remove the shadow below the toolbar with the Theme.AppCompat.Light.NoActionBar, using every recommendation of people who have ever answer it before, but no one worked. I tried </p>
  
  <pre><code>&lt;item name="android:windowContentOverlay"&gt;@null&lt;/item&gt;    
  </code></pre>
  
  <p>and</p>
  
  <pre><code>&lt;item name="android:windowContentOverlay"&gt;@drawable/solid_line&lt;/item&gt; ....
  
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"android:shape="rectangle"&gt;
  &lt;solid android:color="@color/accueil_color" /&gt;
  &lt;size android:height="15dp" /&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>and with this,</p>
  
  <pre><code>android:elevation="0dp"
  </code></pre>
  
  <p>the shadow goes from the top of the screen but not disapear.</p>
  
  <p>Have you any idea for totally remove this shadow line ??</p>