检索已注册的BroadcastReceiver的实例以注销

Question

in my app I have 2 BroadcastReceivers . Lets call the AReceiver and BReceiver . AReceiver is just listening for android.intent.action.BOOT_COMPLETED so it can register BReceiver for a different action, if its turned on in the settings of my app.

So I have a PreferenceActivity that can switch the status of my app, which means:

• Status: On
  • AReceiver will not register BReceiver at boot
  • Changing from Off -> On should register BReceiver
• Status: Off
  • AReceiver will register BReceiver at boot
  • Changing from On -> Off should unregister BReceiver

Here is the problem I'm having. How can I unregister BReceiver if it was either registered in AReceiver or in the PreferenceActivity , which could have been closed in the meanwhile? I don't know what I have to pass to unregisterBroadcastReceiver() as an argument, since it wants the instance of the registered receiver.

How do I retrieve the instance of a registered BroadcastReceiver so I can unregister it?

Answer 1

You should be able to put the BReceiver in the manifest (default disabled) and then enable and disable it at any time. Have a look here

Answer 2

You can make that activation of BReceiver is always done via AReceiver (even when switching OFF->ON in preferences). So that AReceiver stores the instance of BReceiver and is able to unregister it. Does it make sense ?