title: Android options menu not displaying
body: <p>I'm new to Android and I've been trying to add a simple add button as mentioned below </p>
  
  <p><strong>list_menu.xml</strong></p>
  
  <pre><code>&lt;menu xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;item 
          android:id="@+id/menu_insert"
          android:icon="@android:drawable/ic_menu_add"
          android:title="@string/menu_insert"              
      /&gt;     
  &lt;/menu&gt;
  </code></pre>
  
  <p><strong>MyActivity.java</strong></p>
  
  <pre><code>@Override
      public boolean onCreateOptionsMenu(Menu menu) {
          // Inflate the menu; this adds items to the action bar if it is present.
          super.onCreateOptionsMenu(menu);
          getMenuInflater().inflate(R.menu.list_menu, menu);
  
          return true;  
      }
  </code></pre>
  
  <p>I read in Dummies series book that ic_menu_add is already there in resources and I don't  need to add it, but when I run this code it does not display. I've tried to add  a custom icon with same name still there is no button. Can someone help me with it please.</p>