Why is my BroadCast Receiver not working?

Question

I am learning about BroadCast Receivers. What I am trying to achieve with the following piece of code is, I would like to see a toast when I switch to airplane mode, where the a

Answer 1

The Official document of Broadcast Receivers Says:

android:exported

Whether or not the broadcast receiver can receive messages from sources outside its application — "true" if it can, and "false" if not. If "false", the only messages the broadcast receiver can receive are those sent by components of the same application or applications with the same user ID.