title: (Android Studio) Custom Action Bar Layout isnt filling whole action bar
body: <p>before setContentView()</p>
  
  <pre><code>LayoutInflater inflater = (LayoutInflater) getSupportActionBar() .getThemedContext().getSystemService(LAYOUT_INFLATER_SERVICE);
  View customActionBarView = inflater.inflate(R.layout.ab, null);
  android.support.v7.app.ActionBar actionBar = getSupportActionBar();
  actionBar.setDisplayOptions( ActionBar.DISPLAY_SHOW_CUSTOM,  ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_SHOW_HOME | ActionBar.DISPLAY_SHOW_TITLE);
  actionBar.setCustomView(customActionBarView,    new android.support.v7.app.ActionBar.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT,  ViewGroup.LayoutParams.MATCH_PARENT));
  </code></pre>
  
  <p>in ab.xml
  <img src="https://i.imgur.com/rHCHXE8.png" alt="image1"></p>
  
  <p>in My Application</p>
  
  <p><img src="https://i.imgur.com/LiRF0qa.png" alt="image2"></p>
  
  <p>int styles.xml
     </p>
  
  <pre><code>&lt;!-- Base application theme. --&gt;
  
  &lt;style name="AppBaseTheme" parent="Theme.AppCompat.Light"&gt;
  
  &lt;/style&gt;
  &lt;style name="ATheme" parent="AppBaseTheme"&gt;
      &lt;item name="android:actionBarStyle"&gt;@style/AppTheme.ActionBar.a&lt;/item&gt;
      &lt;item name="actionBarStyle"&gt;@style/AppTheme.ActionBar.a&lt;/item&gt;&gt;
      &lt;item name="android:icon"&gt;@android:color/transparent&lt;/item&gt;
  &lt;/style&gt;
  &lt;style name="AppTheme.ActionBar.a" parent="Widget.AppCompat.Light.ActionBar"&gt;
      &lt;item name="android:height"&gt;50dp&lt;/item&gt;
      &lt;item name="android:background"&gt;#d1d1d1&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p></p>
  
  <p>in my Application, isn't filling action bar completely</p>