title: When I click on a Spinner item, it will show a ListView
body: <p>I want to make an app which contains a Spinner and a ListView and when I click a Sinner item it will open a new ListView, no new Activity just to update the ListView from the database.  </p>
  
  <p>For instance, I have Europe and Africa in the Spinner and when I click Europe it will show me a ListView with the European countries, when I click Africa it will show me a ListView with the African countries.</p>
  
  <p>I searched this on the internet, but I could not find anything.</p>