title: android service exported attribute?
body: <p>I am quite new to the android platform. I want to export my service to be publicly used.
  I find something on developer doc</p>
  <blockquote>
  <p><code>android:exported</code>
  Whether or not components of other applications can invoke the service or interact with it — &quot;true&quot; if they can, and &quot;false&quot; if not. When the value is &quot;false&quot;, only components of the same application or applications with the same user ID can start the service or bind to it.</p>
  </blockquote>
  <p>but I don't understand it
  Can anyone show me a brief example of how to use it?</p>