ConnectivityManager.CONNECTIVITY_ACTION，注册一个接收器时，始终广播？ [英] ConnectivityManager.CONNECTIVITY_ACTION, always broadcast when registering a receiver?

问题描述

我注册一个接收器捕捉到Co​​nnectivityManager.CONNECTIVITY_ACTION的在code 的，即我不注册它在应用程序清单。所有工作正常，但我注意到，我自动只要注册我的接收器，尽管网络是已在接收广播。

I'm registering a receiver to capture the ConnectivityManager.CONNECTIVITY_ACTION in code i.e. I am not registering it in the application manifest. All is working fine but I notice that I automatically receive a broadcast as soon as I register my receiver and despite the network being already on.

我的问题是，我可以靠这个自动播放检查网络是否可用与否，即没有明确调用方法检查网络？

My question is can I rely on this automatic broadcast to check whether the network is available or not i.e. not explicitly call methods to check the network?

我只是期待一个广播当网络改变了，而不是在注册我的接收器，但事实上，我确实收到广播是非常有用的，但我可以依靠它。这是一个记录行动？

I was only expecting a broadcast when a network changed and not upon registering my receiver, however the fact that I do receive a broadcast is very useful but can I rely on it. Is this a documented action?

推荐答案

是的，这就是所谓的<一个href="http://developer.android.com/reference/android/content/Context.html#sendStickyBroadcast%28android.content.Intent%29"相对=nofollow>持久广播。持久广播发送尽快 registerBroadcast 被称为接收器。

Yes, that's called sticky broadcasts. Sticky broadcasts are sent to receiver as soon as registerBroadcast is called.

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