Hiding soft keys, notification area, and clock in Android 3.1
<p>The built-in photo gallery hides the soft keys (back, home, etc.), clock, and notification area at the bottom of the screen, but I can't seem to hide them myself in Android 3.1, even with:</p>

<pre><code>requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
</code></pre>

<p>Is this possible?</p>
