Android how to group async tasks together like in iOS

You can simply do it with this class I made to mimic the iOS behavior. Call enter() and leave() the same way you did in iOS with dispatch_group_enter and dispatch_group_leave and call notify() just after the requests you want to group, just like dispatch_group_notify. It also uses runnable the same way iOS uses blocks :

public class DispatchGroup {

    private int count = 0;
    private Runnable runnable;

    public DispatchGroup()
    {
        super();
        count = 0;
    }

    public synchronized void enter(){
        count++;
    }

    public synchronized void leave(){
        count--;
        notifyGroup();
    }

    public void notify(Runnable r) {
        runnable = r;
        notifyGroup();
    }

    private void notifyGroup(){
        if (count <=0 && runnable!=null) {
             runnable.run();
        }
    }
}

Hope it helps 😉