RxJava and Retrofit2: NetworkOnMainThreadException

Question

I realize that I am using subscribeOn()/observeOn() on the MainThread. What are the set of options I can pass into subscribeOn()? What are the set of options I can pass into

Answer 1

You should call Observable.unsubscribeOn(Schedulers.io()), retrofit will unsubscribe at the end of a http-request.

In RxJavaCallAdapterFactory of retrofit-rxjava-adapter

it actions like this.

if (!subscriber.isUnsubscribed()) {
    subscriber.onCompleted();
}

But when subscriber is a SafeSubscriber, it'll call unsubscribe finally.

I have this issue in my app.

Full code:

o.subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .unsubscribeOn(Schedulers.io());

Answer 2

Rewrite the last part of your code to:

service.getOneTestRx()
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(new Subscriber<MyTest>() {
        @Override
        public void onCompleted() {
            Log.d(TAG, "[onCompleted] ");
        }

        @Override
        public void onError(Throwable t) {
            Log.d(TAG, "[onError] ");
            t.printStackTrace();
        }

        @Override
        public void onNext(MyTest m) {
            Log.d(TAG, "[onNext] " + m.toString());
        }
    });

Important note from @akarnokd:

Worth mentioning that one needs to chain the calls as here because Observable is not the builder pattern (where you modify the settings of an existing object)