title: In libgdx, how do I get input from the back button?
body: <p>For my game, I'd like the Android back button to take you to the pause menu, instead of minimizing the game. From what I've googled, I know I need to call</p>
  
  <pre><code>Gdx.input.setCatchBackKey(true);
  </code></pre>
  
  <p>But how do I actually check for the button press? input.isKeyDown(Keys.BACK) doesn't seem to do anything.</p>