title: DrawerLayout.openDrawer does not work the first time
body: <p>I am using a <code>android.support.v4.widget.DrawerLayout</code> in my activity.
  As long as I use the swipe gesture to open it, it works fine.</p>
  
  <p>However, when I want to open it through a button click by calling <code>drawer.openDrawer(Gravity.LEFT)</code>, it does not work.</p>
  
  <p>But, <strong>if I open it once using the swipe gesture, after that it works normally with button click</strong>.</p>
  
  <p>Any idea how I could solve or work around this?</p>