Android RxJava, Non Blocking?

Question

It was my understanding that rxjava-android performs operations on a separate thread (when provided the correct Scheduler), leading to non-blocking operations, however a qui

Answer 1

The mistake is that you use the wrong Observable. The correct code should be:

Observable observable = Observable.create(new Observable.OnSubscribe<Object>() {
  @Override
  public void call(Subscriber<? super Object> subscriber) {
    int i = 0;
    while (i == 0) {}
    subscriber.onCompleted();
  }
});
observable.subscribeOn(Schedulers.newThread()).observeOn(AndroidSchedulers.mainThread()).subscribe();

Both subscribeOn and observeOn return a new Observable which implements their functions. But the original Observable is not modified. Actually, every operator will always create a new Observable without modifying the original one.