title: Android support action bar not showing overflow menu
body: <p>My android app supports 2.2 and higher. I'm using the appcompat support library for the action bar, so it should only show if there are things that don't fit. I want my action bar to support the overflow button (the three vertical squares) that reveals a menu with the other items when clicked.</p>
  
  <p>In my menu file, I have three items set up. However on the app I only see two of them, and the overflow button is not showing as well.</p>
  
  <p>activity_menu.xml</p>
  
  <pre><code>&lt;menu xmlns:android="http://schemas.android.com/apk/res/android" 
      xmlns:sord.ids_connect="http://schemas.android.com/apk/res-auto"&gt;
  
      &lt;item
          android:id="@+id/action_settings"
          android:icon="@drawable/checkbox"
          android:title="@string/action_settings"
          sord.ids_connect:showAsAction="ifRoom" /&gt;
  
      &lt;item
          android:id="@+id/action_settings2"
          android:icon="@drawable/checkbox_checked"
          android:title="@string/action_settings"
          sord.ids_connect:showAsAction="ifRoom" /&gt;
  
      &lt;item
          android:id="@+id/action_settings3"
          android:icon="@drawable/ic_launcher"
          android:title="@string/action_settings"
          sord.ids_connect:showAsAction="ifRoom" /&gt;  
  
  &lt;/menu&gt;
  </code></pre>
  
  <p>java file</p>
  
  <pre><code>import android.os.Bundle;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.support.v7.app.ActionBar;
  import android.support.v7.app.ActionBarActivity;
  
  public class Activity_Menu extends ActionBarActivity {
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_menu);
  
          ActionBar actionBar = getSupportActionBar();
          actionBar.setDisplayHomeAsUpEnabled(true);
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          // Inflate the menu; this adds items to the action bar if it is present.
          getMenuInflater().inflate(R.menu.activity_menu, menu);
          //return true;
          return super.onCreateOptionsMenu(menu);
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          switch (item.getItemId()) {
              case android.R.id.home:
                  super.onBackPressed();
                  return true;
          }
          return super.onOptionsItemSelected(item);
      }
  }
  </code></pre>
  
  <p>manifest</p>
  
  <pre><code>    &lt;activity
          android:theme="@style/Theme.AppCompat.Light.DarkActionBar"
          android:name="sord.ids_connect.Activity_Menu"
          android:screenOrientation="portrait"
          android:label="@string/title_activity_menu" &gt;
      &lt;/activity&gt;
  </code></pre>