What is a Broadcast Receiver?
Broadcast Receiver: is the component of android which gets triggered when ever android systems sends a broadcast announcement.
Generally, when ever an important event happens in the phone (like battery low), android system will send a broad
cast message to all the applications. Who ever is interested to catch that message can use Broadcast Receiver to
handle that message.
Note: Broadcast receiver has a time limitation of 10 seconds. What ever you want to do in a receiver, you have to finish it off in 10 seconds.
Else android may force close your receiver.
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