How to Make Your Code Clean With Kotlin Sealed Classes

In this video you will learn how you can make your code cleaner using Kotlin sealed classes.

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00:00 - Introduction
00:18 - Sealed classes vs. enum classes
07:23 - Using sealed classes to handle responses
10:41 - Exposing state in a ViewModel
14:58 - Making your code more readable

[francismwangi]

I was really struggling to understand sealed classes, but now I can even explain to someone else after watching the video. Thanks Phillip

[jatinvashisht]

OMG, you made the video on topic I requested in one of your recent videos.
Thank You Philipp 😊

[petejewel]

Enum classes limit instantiation. Sealed classes limit inheritance.

[niksha]

Thank you, Philipp ! 12:00 important info that is sealed class could be only one of the states you declared, but in data class you can use to define stated that could happen in one time and also declare there states in sealed classes if u need behavior of sealed that I said above

[AmitJayant]

16:50 "I don't know, there are so many now a days" 😂😂

[АлексейРодионов-ыо]

I just today wanted to learn about sealed classes and here you are.

[chrisfelix]

I am always happy to be welcomed back to your new video 🤓

[sooshil]

I was not using them because I was not understanding them clearly. And, that is over now. Thanks Phil.... :)

[bjugdbjk]

tysm !! I was looking for the best tutorial for sealed classes and here it goes :) !! u r bringing smiles to android dev's crazy life !! Thanks a ton, buddy !!

[keepgoingman]

I always wait for your new videos. thank you so much. i love it!

[venkatesh]

I thought that I knew the use of sealed class. But it went wrong after this video 🤭🤭

Thank you Philipp

[mustafaammar]

Very cool video
I don't use sealed classes usually put after this video i will use it more
Thank you Bro
I wish you all the best

[ubersticks]

What is the thought for naming the Success/Fail data wrapper "Resource"? I see this similar technique with the same name (Resource) in other blogs and tutorials. "Result" seems a more intuitive name - but I see that Kotlin already has a built-in type class called "Result" with a very similar structure as the "Resource" code. Why not use the built-in Result and why name this Resource?

[bboydarknesz]

thanks. but when get data from API to data class response, how can the field knows which object sealed class to use?
for example, json response { name: 'Khalifa', gender: 'male' } with our sealed class Gender { Male, Female }
is it automatically serialize base the object name?

[pentexnyx]

I use it to listen to distinguish between Loading, Success and Failure states using when via collecting the flow as State :)

[kamertonaudiophileplayer]

The general problem of teaching to a language capability nowadays is providing a cookbook approach. I will show you how to use sealed classes. Oh, cool. Imagine we have a car class and... Okay, why do not show it in a different way. Show class of problems sealed classes can help you to solve.

[juancaos]

<3 I love your classes, Soon I going to present to a job offer due to your content c:. Literally, you changed my life c:

[GoodGuyFinishFirst]

But why not to use enum in example with Gender? It should be more concise.

[damercy]

Am I the only one who saw Mia Khalifa in the list of persons at 8:58? xD On a serious note, thank you for these content Phillip. :)

[pradeep]

hi Philipp, thank you the nice tutorial, I'm struggling with BaseActivity, BaseFragment, BaseViewModel and Almost every thing with prefix Base, Struggling to understand and write code in internship for my organization, 🙏 please make a video to clear this Base Prefix.