How to implement a Broadcast Receiver component that works only within the current application?

To ensure that a Broadcast Receiver works only within the current application, it must be registered dynamically via code, not in the manifest. When registered dynamically using registerReceiver(), the receiver will only receive broadcast messages sent within the application.

Example:

BroadcastReceiver receiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        // handle event
    }
};

// Register in Activity or Service
IntentFilter filter = new IntentFilter("com.example.MY_ACTION");
registerReceiver(receiver, filter);

// Don't forget to unregister
unregisterReceiver(receiver);

This way, you limit the scope of the Broadcast Receiver to the current application, as system or other applications cannot send such local broadcast messages.