Android Development with Kotlin

Object expression

An object expression is equivalent to Java's anonymous class. It is used to instantiate objects that might inherit from some class or that implements an interface. A classic use case is when we need to define objects that are implement an interface. This is how in Java we could implement the ServiceConnection interface and assign it to a variable in Java:

    ServiceConnection serviceConnection = new ServiceConnection() { 
        @Override 
        public void onServiceDisconnected(ComponentName name) { 
            ...        } 
 
        @Override 
        public void onServiceConnected(ComponentName name,             IBinder service)         {            ... 
        } 
    } 

The closest Kotlin equivalent of the preceding implementation is the following:

 val serviceConnection = object: ServiceConnection { override fun ...