在清单中注册时需要注销Android Broadcastreceiver吗？

Question

So mainly that is the question, when I register a Broadcastreceiver dynamically, it is needed to be unregistered at onDestroy . But when the Broadcastreceiver is registered within the manifest, do we need to unregister it?

Answer 1

You cannot unregister a manifest-registered receiver. If the receiver is enabled, it will always be listening for broadcasts.

Answer 2

You should be careful while adding broadcast receiver because unnecessary broadcast receivers drain battery power.

If you add the broadcast receiver in the Android manifest file , it's implied that you are going to handle a particular intent in the broadcast receiver and not ignore it.

You can use the PackageManager to enable/disable a BroadcastReceiver in declared in the Manifest. The Broadcast Receiver will get fired only when it is enabled.

For more info see Android - how to unregister a receiver created in the manifest?

There is a way to enable and disable the broadcast receiver which is added in the manifest file.

See this post Android broadcast receiver: Registering/unregistering during runtime