Activity和Service交互

最新推荐文章于 2021-05-27 22:23:09 发布

转载最新推荐文章于 2021-05-27 22:23:09 发布 · 93 阅读

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原文链接：https://my.oschina.net/wrs/blog/270891

本文讨论了如何创建既可以通过startService()启动也可以通过bindService()绑定的服务。当服务被启动时，即使所有客户端解除绑定，系统也不会销毁该服务，除非显式调用stopSelf()或stopService()来停止它。此外，本文还探讨了实现onBind()和onStartCommand()的情况，例如音乐播放器应用程序可能希望其服务无限期运行，并同时提供绑定。

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As discussed in the Services document, you can create a service that is both started and bound. That is, the service can be started by calling startService(), which allows the service to run indefinitely, and also allow a client to bind to the service by calling bindService().

If you do allow your service to be started and bound, then when the service has been started, the system does not destroy the service when all clients unbind. Instead, you must explicitly stop the service, by calling stopSelf() or stopService().

Although you should usually implement either onBind() or onStartCommand(), it's sometimes necessary to implement both. For example, a music player might find it useful to allow its service to run indefinitely and also provide binding. This way, an activity can start the service to play some music and the music continues to play even if the user leaves the application. Then, when the user returns to the application, the activity can bind to the service to regain control of playback.

Be sure to read the section about Managing the Lifecycle of a Bound Service, for more information about the service lifecycle when adding binding to a started service

转载于:https://my.oschina.net/wrs/blog/270891