Please, return Observable!

[MrVilkaman]

Why not return Observable insted callback?
Callback is bad way!

[kevalpatel2106]

@MrVilkaman Is there any soecific reason for that, which I am not aware of??

[MrVilkaman]

Of course:

1. You hold link on listener. So it is way to memory leak.

2. You lost information about cause of error
   for example if I will want show snackbar when internet connection is lost (IOException or NetworkErrorException) and show alert dialog when handle simple HttpException. How I can do without instanceOf ?

3. I want continue work with response ( save to DB, convert to other model, etc) or combine with another queries. And I want use RxJava for this. How I can do this? Use Observable.create? I think it is bad way!