title: OptionMenu does not appear
body: <p>I am learning Android developpment. So far I have created a basic application and I would like to display an OptionMenu. I have followed a tutorial.
  The menu doesn't appear on my phone. Maybe I have forgotten something?</p>
  
  <p>I have looked at this post: 
  <a href="https://stackoverflow.com/questions/12395747/option-menu-does-not-appear-in-android">Option Menu does not appear in Android</a>
  but it seems that my problem is different.</p>
  
  <pre><code>@Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setHasOptionsMenu(true);
  }
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      int id = item.getItemId();
      if (id == R.id.action_refresh) {
          FetchWeatherTask weatherTask = new FetchWeatherTask();
          weatherTask.execute();
          return true;
      }
      return super.onOptionsItemSelected(item);
  }
  @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
      inflater.inflate(R.menu.forecastfragment, menu);
  }
  </code></pre>
  
  <h2>Here is the code of menu</h2>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"&gt;
      &lt;item android:id="@+id/action_refresh"
          android:title="@string/action_refresh"
          app:showAsAction="never" /&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <p>I have spent hours. Rewritten the code from scratch 2 times but the problem is still here.
  Everything works well, except that the menu does not appear.
  What is the problem?</p>