title: What is the ID of the back arrow drawable in the ActionBar?
body: <p>The following code causes a back arrow to appear in the ActionBar:</p>
  
  <pre><code>getSupportActionBar().setDisplayShowHomeEnabled(true);
  getSupportActionBar().setDisplayHomeAsUpEnabled(true);
  </code></pre>
  
  <p>I'm looking for the resource ID of the arrow drawable, i.e. android.R.drawable.xxx.  The reason I need this ID is so that I can manually set an identical arrow (size &amp; colour) elsewhere in my app.</p>
  
  <p>I tried making my own drawable and using that but the size was different from the one in the ActionBar.</p>