android broadcast receivers

In Android, a BroadcastReceiver is a component that receives and responds to system-wide broadcast messages, such as a battery low message or a network connectivity change message. A BroadcastReceiver can be used to initiate an action in response to a broadcast message.

Here are some key points to know about Android Broadcast Receivers:

1. Broadcast Receivers are defined as a separate component in the AndroidManifest.xml file of an application.

2. A BroadcastReceiver can be registered either dynamically or statically.

3. A BroadcastReceiver can be used to initiate an action in response to a broadcast message, such as launching an Activity, starting a Service, or displaying a notification.

4. There are two types of broadcast messages: system-generated and application-generated.

5. System-generated broadcast messages are sent by the Android system and are received by all registered receivers.

6. Application-generated broadcast messages are sent by the application itself and are received by only those receivers that have been registered to receive that particular broadcast message.

7. Broadcast receivers can also be used to pass data between components of an application.

8. Broadcast receivers can also be used to receive and respond to user-defined broadcast messages.