title: How to show a message box before star an activity?
body: <p>In my activity i throw a new one with this code:</p>
  
  <pre><code>    intent = new Intent(this, NewActivity.class);
      startActivity(intent);
  </code></pre>
  
  <p>How to show a message before launching new activity? I would like to show a warning to users before going to new activity, in which just press OK button to go on...</p>