Code for switching data between work thread and main thread using Handler.post()

INotifier

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

WorkThread

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

WorkTracker

public class WorkTracker implements INotifier {
    
    private Handler mHandler = new Handler();
    
    static class NotifyRunnable implements Runnable {
        private Object mPayload;
        
        public NotifyRunnable(Object data) {
            mPayload = data;
        }
        public void run() {
            //when post to hanlder based on main looper, now we run on main thread.
            
        }
    }
    
    public void onNewData(Object payload) {
        //called on WorkThread, use Handler to change to main thred.
        mHandler.post(new NotifyRunnable(payload));
    }
    
}