Android BroadcastReceiver生命周期：动态注册接收器的文档错误？

Question

I define a BatteryInfo extends BroadcastReceiver class. I call its constructor once in my Activity onCreate() . I register it with Activity.registerReceiver in my onCreate() .

I am trying to figure out whether I need to unregister it and/or set its reference to null in order to allow my Activity to die without leaking memory or clogging up intent senders in the system, or whether the system gracefully tosses everything associated with this on its own. Towards that end I am pondering the BroadcastReceiver Lifecycle where I read:

A BroadcastReceiver object is only valid for the duration of the call to onReceive(Context, Intent). Once your code returns from this function, the system considers the object to be finished and no longer active."

what does this mean? Obviously the object I have created with new BatteryInfo() and registered with registerReceiver() persists through the entire time my activity persists. I log results from it and see them that entire time. Obviously it has not become invalid after the first time its onReceive() was called.

I am wondering if this section of documentation perhaps applies only to BroadcastReceivers which are registered in the AndroidManifest ? And that it is simply incorrect or irrelevant to BroadcastReceivers that are dynamically created and registered?

And of course, I am wondering what is proper clean up and derferencing for my dynamic receivers.

Answer 1

All you need to do for BroadcastReceivers in code is register and unregister them. That statement is to inform you that you can't do any work outside of the onReceive , for example in another thread, and return a value back to the BroadcastReceiver . To do that you would get the BroadcastReceiver to start a Service .