create is an important method to create Observable. Below are few points which make Observable using create interesting

Creates from scratch

observer methods are programmatically written

emitter method is provided for interfaces to use

Below is the code which can help you to understand creating Observable using create method.

Here we are trying to create Observable using create method where we get 15 different shapes. The create method provides a subscribe method where we are iterating each elements from list and emitting one by one. The emitted events are listened on DemoSubscriber.

For RxUtil.java class and DemoSubscriber and for full code you can refer git library : https://github.com/CODINGSAINT/rxJava-tutorial

Now once you run it you will get following output