的的在这里的 是很好的例子，addview的服务，你也可以使用监听器，如果你想在服务。

here is nice example to addview in Service and also you can use listeners if you want in services.

我也在寻找服务听众执行，终于找到了。

i was also looking for the listeners implementation in service and finally found it.

记得加权限

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>

和增加服务类

<application>
.
 .
  <service android:name=".YourServiceClass"></service>
 .
.
</application>

在AndroidManifest.xml中。

in AndroidManifest.xml.