Completely close/reset my Android app
<p>I've made an Android app, and in its first view you can select a date from a calendar. Everything works fine, but if i push the <code>arrow button</code> on my phone the app seems to close, and i get back to the home screen of my phone.</p>

<p>However if I restart the app by clicking its icon i can see the splash screen, and after this the first view... where the date i selected b4 closing the app is still selected!</p>

<p>Is there a way to completely clear all the variable of my app?</p>

<p>Thanks</p>
