Question

What are broadcast receivers? How is it implemented?

Answer 1

A broadcast receiver is a mechanism used for listening to system-level events like listening for incoming calls, SMS, etc. by the host application. It is implemented as a subclass of BroadcastReceiver class and each message is broadcasted as an intent object.

public class MyReceiver extends BroadcastReceiver

{

    public void onReceive(context,intent){}

}

Answer 2

Broadcast Receiver is a mechanism using which host application can listen for System level events. It is used by the application whenever they need to perform the execution based on system events like listening for Incoming call, sms etc. It helps in responding to broadcast messages from other application or from the system. It is used to handle communication between Android operating system and applications.