title: onKeyUp doesn't work for KEYCODE_DPAD_CENTER
body: <p>I have 2 activities, where I overrided the onKeyUp event:</p>
  
  <pre><code>@Override
      public boolean onKeyUp(int keyCode, KeyEvent event) {
          Log.d(TAG, "Key up: " + keyCode);
          return super.onKeyUp(keyCode, event);
       }
  </code></pre>
  
  <p>The first is the main activity of the application, the other one is secondary. The first works fine, but the second captures events for Left-Right-Up-Down but not for Center click. Why?</p>