Learn(Actually) RxJava(RxJava2, RxJava3) Operators By Examples

Amit Shekhar
Mar 22 · 4 min read

In this blog, we are going to learn RxJava(RxJava2) operators by examples.

I personally believe that we can solve any complex problem very easily with RxJava Operators which can be very difficult without RxJava. RxJava is just awesome.

Don’t forget: There is an operator for everything in RxJava.

The best way to learn RxJava(RxJava) operators is to learn them by examples. In this blog, I have composed a few great problems with solutions using the RxJava operators. Let’s learn by one by one.

I recommend learning one example a day. So don’t forget to bookmark this blog post to refer on the next day.

Implement Search Using RxJava Operators

Nowadays, most of the applications that we use in our daily life come with a search feature which provides us a facility to get things very quickly we are looking for. So, having a search feature is very important. And, we as a developer have a responsibility to implement it in a better way.

The solution uses the following operators:

  • Filter Operator
  • Debounce Operator
  • DistinctUntilChanged Operator
  • SwitchMap Operator

We will learn all the above four RxJava Operators.

Learn from here.

Understanding RxJava Zip Operator With Example

Zip operator allows us to get the results from multiple observables at a time.

This operator helps you to run all the tasks in parallel and returns the results of all the tasks in a single callback when all the tasks are completed.

Learn from here.

Implement Caching In Android Using RxJava Operators

Caching is very useful in the following situations:

  • Reduce network calls: We can reduce the network calls by caching the network response.
  • Fetch the data very fast: We can fetch the data very fast if it is cached.

Let’s learn how to implement caching in Android using the following RxJava Operators:

  • Concat Operator
  • FirstElement Operator

Learn from here.

FlatMap Vs Map Operator

FlatMap & Map are very important operators in RxJava. Let’s learn how they are different and how to choose when to use which one.

Learn from here.

Concat Vs Merge Operator

Concat & Merge are other important operators in RxJava. Let’s learn how they are different and how to choose when to use which one.

Learn from here.

Understanding RxJava Timer, Delay, and Interval Operators

Operators like Timer, delay & Interval are very useful to solve specific problems. Let’s learn when to use which one.

Learn from here.

Understanding RxJava Defer Operator

In this blog, we are going to learn the RxJava Defer Operator. We will understand when to use Defer operator depending on our use-case. Most of the time, we do mistake while using the RxJava Defer Operator. Let’s understand it clearly to avoid the mistake.

Learn from here.

Understanding RxJava Create and fromCallable Operator

In this blog, we are going to learn the RxJava Create and fromCallable Operators. We will understand when to use the Create operator and when to use the fromCallable operator depending on our use-case. Most of the time, we do mistake while using RxJava Operators. Let’s understand it clearly to avoid the mistake.

Learn from here.

Bonus after learning the above RxJava Operators

Check RxJava3 Android Examples.

Check All Free Android Tutorials By MindOrks.

Happy Learning RxJava Operators :)

Team MindOrks

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Amit Shekhar

Written by

IIT | Co-Founder at MindOrks & AfterAcademy | Learner & Teacher at MindOrks & AfterAcademy | Medium Top Writer | Machine Learning | https://amitshekhar.me

MindOrks

MindOrks

Our community publishes stories worth reading on software development and design. Android | Machine Learning | #MakeEveryoneCode