android - 使用什么在后台执行网络操作？

Question

我正在从 BroadcastReceiver 执行网络操作。此操作正在后台执行，发生这种情况时应用程序将不会运行。

哪个更好用？ Service 还是 AsyncTask？

Answer 1

一个BroadcastReceiver对象仅在调用 onReceive() 期间有效。一旦您的代码从此函数返回，系统就会认为该对象已完成并且不再处于 Activity 状态。因此，仅使用 AsyncTask 是有意义的。或Thread在这里。

同样来自documentation :

In particular, you may not show a dialog or bind to a service from within a BroadcastReceiver.

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If this BroadcastReceiver was launched through a <receiver> tag, then the object is no longer alive after returning from this function. This means you should not perform any operations that return a result to you asynchronously -- in particular, for interacting with services, you should use startService() instead of bindService(). If you wish to interact with a service that is already running, you can use peekService()

这意味着您可以 startService()从广播 rcvr 中，通过 Intent 传递网络操作所需的数据。该服务将执行网络操作。如果服务粘性，可以使用peekService() 。但你永远不应该bindService()到广播 rcvr。