ClassCastException: android.os.Handler$MessengerImpl cannot be cast to My -

i have declared handler in service:

final messenger messenger = new messenger(new musicapicontrolhandler());   public class musicplayerbinder extends binder {     public musicplayerservice getservice() {         return musicplayerservice.this;     } }  @override public ibinder onbind(intent intent) {     return messenger.getbinder(); }  public class musicapicontrolhandler extends handler {      @override     public void handlemessage(message msg) {         //     }  } 

in class implements serviceconnection , binds service, following:

@override public void onserviceconnected(componentname componentname, ibinder ibinder) {     handler = (musicplayerservice.musicapicontrolhandler) ibinder;  } 

my problem is, classcastexception when try cast binder handler, should instance of because it´s set binder of messenger.

where going wrong?

i have not declared service process