What methods are used to interact with Bound Service in Android?

Interaction with Bound Service in Android is carried out through the following methods:

1. Binding: The client (e.g., Activity) binds to the service via bindService(). Upon successful binding, the onServiceConnected() method is called, where the client receives an IBinder object to interact with the service.

2. Calling service methods: Using the obtained IBinder, the client can directly call the public methods of the service, allowing data exchange and service management.

3. Unbinding: When the interaction ends, the client calls unbindService() to disconnect.

Example of a simple Bound Service:

public class MyService extends Service {
    private final IBinder binder = new LocalBinder();

    public class LocalBinder extends Binder {
        MyService getService() {
            return MyService.this;
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }

    public int getRandomNumber() {
        return new Random().nextInt(100);
    }
}

// In Activity
private ServiceConnection connection = new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        MyService.LocalBinder binder = (MyService.LocalBinder) service;
        myService = binder.getService();
        bound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        bound = false;
    }
};

bindService(intent, connection, Context.BIND_AUTO_CREATE);

Thus, interaction occurs through the IBinder interface and the bindService/unbindService methods.