How does Broadcast receivers work internally in Android SDK?

Broadcast receivers are a crucial component of the Android operating system. They allow applications to listen for system-wide broadcast announcements. An application can register to receive specific intents, and when those intents are sent by the OS or other applications, the broadcast receiver responds by triggering the appropriate method to handle the incoming broadcast.

Internally, the Android system uses a combination of the Intent system and the Application's manifested configuration to enable broadcast receivers. When a broadcast is sent, it traverses through all registered receivers listening for that specific type of intent. The Android framework manages the entire lifecycle of these receivers, ensuring they are invoked appropriately.

The broadcast receiver itself acts like a listener that waits for certain events or broadcasts to occur. When an event happens, such as a device boot or connectivity change, the registered receiver is activated and executes its onReceive method.

Example of a Broadcast Receiver