cts even
    when your app is in the background, but doesn't force your app to the foreground. If you
    want to notify the user about an event that happened in the background while your app was not
    visible, use a <code><a href="../../reference/android/app/Notification.html">Notification</a></code>. <i>Never</i> start an
    <code><a href="../../reference/android/app/Activity.html">Activity</a></code> in response to an incoming broadcast
    <code><a href="../../reference/android/content/Intent.html">I