ObserveSwipe.java

@Override protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  info = (TextView) findViewById(R.id.info);

  swipe = new Swipe();

  subscription = swipe.observe()
      .subscribeOn(Schedulers.computation())
      .observeOn(AndroidSchedulers.mainThread())
      .subscribe(new Action1<SwipeEvent>() {
        @Override public void call(final SwipeEvent swipeEvent) {
          info.setText(swipeEvent.toString());
        }
      });
}