title: Android: full-width SearchView in ActionBar
body: <p>I want a SearchView to fully take up the full width of the ActionBar (support v7), but even after calling...</p>
  
  <pre><code>actionBar.setHomeButtonEnabled(false);
  actionBar.setDisplayShowTitleEnabled(false);
  actionBar.setDisplayShowCustomEnabled(false);
  actionBar.setDisplayUseLogoEnabled(false);
  actionBar.setDisplayShowHomeEnabled(false);
  </code></pre>
  
  <p>... I get a blank space to the left:</p>
  
  <p><img src="https://i.stack.imgur.com/wcf6L.png" alt="Search bar"></p>