android : how could I exit the app?
<p>In my android application I changed the back button functionality so that it goes to the main screen of my game , now that it's on the main screen how should I exit the whole application with back button ?</p>

<pre><code>public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if (keyCode == KeyEvent.KEYCODE_BACK ) {
          Assets.getInstance().getClick().play(1);
          this.clearScreenStack();
          this.setScreen(new MainMenuScreen(this));
        return true;
    }

    return super.onKeyDown(keyCode, event);
}
</code></pre>
