Code for exchanging Parcelable data between work thread and main thread

INotifier

public interface INotifier {
    void onNewData(Parcelable payload);
}

WorkThread

public class WorkThread {
    private INotifier mNotifier;
    
    public void run() {
        Parcelable payload;
        //do your network relate stuff
        
        mNotifier.onNewData(payload);
    }
}

WorkTracker

public class WorkTracker implements INotifier {
    
    private Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            //run on ui thread now! 
            Parcelable payload = (Parcelable)msg.obj;
        }  
    };
    
    public void onNewData(Parcelable payload) {
        //called on WorkThread, use Handler to change to main thred.
        mHandler.sendMessage(Message.obtain(null,0,0,payload));
    }
    
}