title: openOptionsMenu not work with full-screen
body: <p>I have an activity with full-screen mode </p>
  
  <pre><code>  android:theme="@android:style/Theme.NoTitleBar.Fullscreen" 
  </code></pre>
  
  <p>and I used button to open the option menu </p>
  
  <pre><code>dmenu.setOnClickListener(new OnClickListener() {
  
              public void onClick(View v) {
                  openOptionsMenu();
  
              }
          });
  </code></pre>
  
  <p>but when I click the button no thing happens </p>
  
  <p>when I delete the full-screen theme all things work will so I can Open the menu from my button and from tablet soft menu button</p>
  
  <p>how can I open the menu from my button and with full-screen mode </p>