title: How to remove title bar in android api 22 and api 25?
body: <p>I am using android studio 2.2.3. How can i remove title bar from my application?
  I am tried by putting</p>
  
  <pre><code>&lt;activity android:name=".ActivityName"
      android:label="@string/app_name"
      android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"&gt;
  &lt;/activity&gt;
  </code></pre>
  
  <p>in <strong>AndroidManifest.xml</strong> file but it doesn't worked.</p>
  
  <p>Here is screenshot my project
  <a href="https://i.stack.imgur.com/FHG3D.png" rel="nofollow noreferrer">My Project</a></p>
  
  <p>My <strong>Style.xml</strong> file code is</p>
  
  <pre><code>&lt;style&gt;
  &lt;style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"&gt;
      &lt;!-- Customize your theme here. --&gt;
      &lt;item name="colorPrimary"&gt;@color/colorPrimary&lt;/item&gt;
      &lt;item name="colorPrimaryDark"&gt;@color/colorPrimaryDark&lt;/item&gt;
      &lt;item name="colorAccent"&gt;@color/colorAccent&lt;/item&gt; &lt;/style&gt;
  </code></pre>
  
  <p>What should have to change in style.xml file?</p>