从编写代码的角度来说，您需要结合所需的步骤来处理登录和注销活动；这些方法是控制Lotus Sametime bot状态的控制器。
From the coding perspective, you combine the required steps that handle the login and logout activities; these methods are the controller of the status of the Lotus Sametime bot.
应用程序(活动)暂停后，需要注销侦听器，这样以后就不会再收到传感器更新。
When the application (activity) is paused, you want to unregister the listener so you no longer receive sensor updates.
在没有用户活动时自动注销。
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