title: Customize back button on ActionBar (Android)
body: <p>in my app i added back button on ActionBar but this is not visible properly because of dark theme of ActionBar. both ActionBar and back Button are black in color so back button is not visible.</p>
  
  <p>i added this code in values.xml file</p>
  
  <pre><code> &lt;style name="Theme.MyFancyTheme" parent="android:Theme.Holo"&gt;
      &lt;item name="android:homeAsUpIndicator"&gt;@drawable/up&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>and set.</p>
  
  <pre><code>minSdkVersion="14"
  </code></pre>
  
  <p>but it's not showing custom back buttom.</p>