Error: required: android:support.v4.FragmentManager, found: android.app.FragmentManager
<pre><code> FragmentManager manager = getFragmentManager();
</code></pre>

<p>It is giving the error</p>

<blockquote>
  <p>required : android:support.v4.FragmentManager<br>
  found: android.app.FragmentManager</p>
</blockquote>

<p>I am using API 15</p>