// AndroidSchedulers

Scheduler scheduler = AndroidSchedulers.mainThread();
Scheduler scheduler = AndroidSchedulers.from(new Handler());

// AndroidCompositeSubscription

final AndroidCompositeSubscription s = new AndroidCompositeSubscription();

s.add(subscription1);
s.add(subscription2);

s.unsubscribe(); // unsubscribe 1 and 2

// it is reusable!
s.add(subscription3);
s.add(subscription4);

s.unsubscribe(); // unsubscribe 3 and 4, too!

// OperatorAddToCompositeSubscription

Observable.just("foo")
        .lift(new OperatorAddToCompositeSubscription<String>(s))
        .delay(5, TimeUnit.MILLISECONDS)
        .subscribe(...);

s.unsubscribe(); // unsubscribe the above subscription

Subscription subscription = observable.subscribe(subscriber);

// Like Subscriptions.create(Action0), but the action is called on the main thread.
subscription.add(AndroidSubscriptions.unsubscribeOnMainThread(new Action0() {
    @Override
    public void call() {
        // You can touch touch views.
    }
}));