MVVM / MVI Repository Pattern with Hilt

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A very simple example using MVVM / MVI, Repository Pattern, Hilt dependency injection, Network layer with Retrofit, Caching layer with Room, Coroutines.
This is a complete example so you can see the big picture when it comes to using Hilt and android architecture.
Code: github.com/mitchtabian/Dagger...
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Twitter: / mitch_tabian
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#AndroidDev

[@TheAnilmaddala]

This is so useful! and I keep coming back to this. So I created myself a breakdown :) 0:00 Project Setup 3:35 Remote Model creation and Retrofit Setup 12:00 EntityMapper 16:00 Room Setup and Local cache model creation 25:00 Dependency Injection - App + Retrofit 32:05 Dependency Injection - Room 35:00 DataState 38:00 MainRepository creation 43:20 MainViewModel 46:00 MVI 51:30 MainActivity

[@AKAzadanine]

Thanks

[@sheenfabile9460]

This is what im looking for! MVI using flow. Will get membership to support your tutorial. Thank you!

[@msontrent9936]

Really good tutorial. Far more useful than learning it in a classroom. Thanks for taking the time.

[@vrajeshhirani]

Have been browsing quite a few tutorials on MVI & Clean Architecture and yours is definitely the one that I enjoyed watching. Your way of teaching is really good and I appreciate your hard work behind this. Thank you so much.

[@lbars]

Yes, exactly what I needed. All architecture concepts at the same video. Thank you CodingWithMitch ❤

[@dahlola]

Nice tutorial! For anyone wondering, "dao" stands for Data Access Object. So in the context of an database it handles the access to the data.

[@zhanyshmasirov4611]

thank you Matthew(Mitch) , actually english isn't my mother tongue , I'm actually viewing Russian Android developers Channel in youtube , but they're not explaing on begining of project , they're explaining from already done projects and its very heavy to understand if not begin explanation from begining , i'm beginner but I've undertand everything! thank once again. because you've explained from begining in project

[@bro_chenzox]

The most excellent explanation format (a whole hour) - everything from scratch and in order, as in real life, despite the fact that the volume can twitch the eye, but if you do not rush and think about each embedded topic with understanding, it turns out incredibly cool and understandable!!

[@codingwithmitch]

"despite the fact that the volume can twitch the eye" Like the volume of the content or the volume of my audio?

[@bro_chenzox]

@@codingwithmitch Comparing to other Hilt related videos content))

[@edvardgrei1257]

Thank you Mitch. It really opened my eyes. Going to take your paid course for sure. Good Job

[@foivosstamopoulos9709]

PERFECT tutorial! So much knowledge combined. Thank you once again

[@maksonic_official]

powerful work! Thanks so much for this video, I will definitely go to your site to see the lessons!

[@superjkmax88]

This is an awesome video Mitch! I wish credit cards were available in my country so I could buy a membership on your site. I’ve been reading the courses’ source code on github and failing to understand some concepts fully, this video helped me immensely!

[@amateur_gamer101]

I could literally kiss you for this tutorial 😭😭 its so easy to understand. You just got a new follower.

[@vishwaraghavendra8332]

Omg!! Finally.. Was waiting for this tutorial

[@lovemashup7975]

It is definitely the most useful demo I have ever seen. Thanks Mitch for your contribution, it helps a lot :)

[@arulwastaken]

Thank you mitch for wonderful explanation. im working on android almost 2 year with java now i can understand kotline with best approach by watching all your tutorials. I'll suggest your channel and blod and site to colleague.

[@cdmunoz]

Awesome job! Thanks for sharing it with all the community

[@hosseinmirzazadeh290]

You're doing a great job with these tutorials.

[@dineshkhedkar8721]

Thanks!!! Everything on one plate. Great Work

[@nitinnegi9343]

Awesome.. "YOU NAILED IT"

[@jimpauloovejera2599]

This thing is a gold mine! Thanks for the free stuff!

[@mattgraves3709]

I enjoyed this implementation example. Thanks Mitch

[@Irshu]

thanks Mitch, finally a terrific tutorial!

[@bahaaka828]

i really liked it. make more of these kind of videos 1 hour contains the summary of 8 hours course

[@wisnusuryawardhana7891]

THANKS MITCH!!!

[@jamilxt]

That's what I was looking for. Thank you. ^_^

[@gabvideos237]

Thank you for this tutorial! Intuitive & Very useful !

[@georgepereiramarques1445]

Thanks man, such a nice tutorial! Congrats!

[@ofirkosto]

Awesome video !! Thank you Mitch you are doing a great work you should be proud of yourself!

[@SerarEstaifan]

The best ever! Thank you sir 🙏🏻

[@user-cf5ks8cv8l]

Thanks for clear and useful example!

[@nrsingh7203]

wooooh!! Hats off to you man[Amazing explanation of android components]... I wish I can hit more likes...

[@jackli1924]

Thank you Mitch，a wonderful video! Your tech is so excellent and your explaination is so consice and awesome!

[@adamgardner1986]

Awesome video and thank you. Very helpful. Now to figure out how to test that ViewModel and Flow.

[@alvaroisea2259]

Big fan of your tutorials man !, I'm even giving a thumbs up without even watching the whole video sometimes

[@codingwithmitch]

that's what I like to hear

[@ozgurtas4508]

thanks mitch, very good tutorial

[@alitonoliveira1700]

Awesome and fast like a bullet :)

[@gulabpatel7477]

1000 plus salute man. Your explanation methods are so easy. I don't even know and experience In kotlin still I can understand all the things very clear manners

[@malpv]

Nice tutorial! Thanks! Saludos desde Chile!

[@xxluciferinxx]

thanks for this amazing video! leared a lot from this video.

[@SpaceTimeBeing_]

Perfect tutorial!

[@mytubekt]

Very helpful video. Thanks!

[@bjugdbjk]

The best vid to know about modern android development using kotlin,livedata,viewmodel, Hilt and MVi architecture, if the same thing if we want to do with Java and traditional ways..it gonna be 4hrs long r even more...u r awesome Mitch.

[@lbars]

and probably 2 hour for debugging things 😂

[@vahidhoseini1723]

great, good job mitch.

[@aravind_us]

No words to say....it's awesome tutorial....😍😍😍

[@ChrisAthanas]

Gettin close to 100k!!!

[@fahtulrahman8231]

Still The best teacher for android dev i've ever seen hehe

[@bhuvneshvarma7843]

Very good quality code!👏👏👏

[@mrsoommy9162]

Great tutorial! Thanks a lot

[@jaloliddinabdullaev2310]

Best tutorial for MVI on youtube, thanks

[@codingwithmitch]

Ya man no worries

[@foreverrafs]

oh my God this is so good.

[@aliakkawi4759]

Awesome tutorial, thanks a lot

[@abhisheksaxena518]

Amazing tutorial!!

[@polarisnation201]

This video is what i need. Thanks you

[@muhammadsalman4389]

Thanks for MVI ❤️

[@girishak9404]

Wow that's fantastic video. Thanks Mike.

[@codingwithmitch]

*Mitch*

[@girishak9404]

CodingWithMitch Yes Mitch 😂

[@mahmoudramadan8407]

I love it , well done

[@lazaroyesid]

Thanks!! well explained !

[@gunjotsingh3638]

Huge Help !! 🙌🏻

[@M-MZ]

Great stuff! Thanks

[@suren6413]

Am an average developer only. But I have learned a lot by your tutorials. Thanks you a lot Mitch

[@charlien759]

Good video, however with new projects Gson isn't the ideal choice, Jake Wharton says to use kotlinx.serialization, Moshi or Jackson. Moshi is basically Gson V3 in all but name.

[@lional4898]

Great Job!

[@pejmanazad5852]

My brain is burning. 🔥

[@Firespirit233]

why? this is quite easy, and mitch is explaining it very well and simple

[@ryujin5400]

Thanks , This is Awesome

[@MariusDuna]

Regarding with creating models, you can find JSON to KT data class Android Studio extension. You just paste there the JSON and data classes are created for you automatically

[@pgaurav72]

Hilt is awsome!

[@GabrielNovakovskiNunes]

Awesome!

[@alexandretrew3737]

F***ing great!, super helpful !

[@shwetankbhardwaj3190]

Can you please explain more about Entity mapper. Like, how to map an entity to a global model if we have multiple hierarchies of objects

[@bjugdbjk]

Think in a way like moving data from one class to another class, with the same fields available.

[@muhammadhumzakhan9888]

Hats off to you 🤝

[@aalap03]

Superb explanation keep going. Just at 54:55 you can use progressbar.isVisible = isDisplayed to avoid checking if condition and let that view extension method take care of it. :)

[@azamatmahkamov263]

Nice tutorial, very neat. I have one question though, if MVI has State mapper in viewModel, does it mean, we can build very large one viewmodel for the whole application?

[@edwin846]

Nice video! Keep it up! One question that I have is what is the reason of using dependency injection when Kotlin object can be called from anywhere of the code. For example, the Retrofit module you created in the video can be called directly in the MainRepository class without any DI dependencies. Thanks

[@gillesjack9619]

Thanks Mitch. That was great. Do you have the same kind of video with a Room database containing 2 tables joined by a SQL inner join (external key in one of the table). If not, take it as a suggestion because all tutorials I have seen so far only use single SQL table example. I wonder how to use SQL INNER JOIN query in room and integrate it in a MVVM project.

[@benjaminmorales9276]

Hi Mitch, I really appreciate this session, you explained a lot of concepts in an incredible way. Thanks for that!. I would like to ask you if could you create or design a Base Use Case with this approach. I think use Flow makes the things more efficient but, I tried and I could't create a Base Use Case. Could you please show us a way?

[@applombaa6278]

This is something amazing

[@antoniokomangyudistira4150]

Thank you

[@wah_yar_tiwari]

Thank you💯

[@hnim2292]

Hi Mitch, thanks for this example. I have a question, why class DataState and not DataState, what the "out" does?

[@codingwithmitch]

kotlinlang.org/docs/reference/generics.html

[@bradyaiello6830]

Only "pk" needs the @SerializedName, because it's the only field whose name differs from the JSON response. You also don't need @ColumnInfo unless the field name differs from the column name in your table.

[@codingwithmitch]

Just habit

[@akthamahmed2171]

Awsome 👌 thanks you 🧡

[@Serg13975]

Great Tutorial. What should I do if I need to pass a blog as an argument to the viewmodel in case I want to insert it . How can I incorporate it to the MainStateEvent?

[@AhsanAli-vz6mg]

Superb

[@federicocreti4699]

Hello Man, I have a question. I never used before MVI pattern. I want to ask: I have a login screen (a fragment) which uses OAuth2 authentication. I used a viewmodel behind this fragment. I created a sealed state class in the ViewModel, in order to manage the state between the fragment and viewmodel. Is correct set the state both from viewmodel and fragment? I mean, there are some states which are managed from the fragment, so I have to set the state from the fragment, and other states which has to be managed from the viewmodel (and through livedate I update/inform the fragment). Is this approach correct? Or the states should be set just from Fragment? Then I have some states for example: data class ValidLoginStateEvent(val sessionClient: SessionClient) : LoginStateEvent() data class NavigateToUserListEvent(val sessionClient: SessionClient) : LoginStateEvent() ValidLoginStateEvent is set by Fragment. In the ViewModel I have this: when (loginStateEvent) { . . is LoginStateEvent.ValidLoginStateEvent -> { bytenerRepository.setSessionClient(loginStateEvent.sessionClient) setLoginStateEvent(LoginStateEvent.NavigateToUserListEvent(loginStateEvent.sessionClient)) } is LoginStateEvent.NavigateToUserListEvent -> { _state.value = loginStateEvent } . . } Is this approach correct?

[@LetrixAR]

This was really useful, thanks. P.S: Add chapters to the video please!

[@niazsagor]

awesome

[@myyoutubeorel]

Been waiting for an MVI video! Thanks alot:) Quick question Is it legit to use firebase as my backend for an app that will have quite a big user base? I read many different opinions, and I am not sure.. Thanks in advance:)

[@codingwithmitch]

Sure why not

[@arcticmax20]

Thank you :D

[@satnamsingh-qh2si]

🙌🏻

[@techno-trickster636]

) how hilt know what retrofit instance to provide when we have more than 1 retrofit builder with different base URL

[@arindomghosh3144]

It is supper awesome

[@powder77777]

awsome

[@aliakkawi4759]

Hello Mitch and thanks for the tutorial. In the RetrofitModule we hard coded the BaseUrl, is it possible to make the BaseUrl dynamic? do we need to create a new RetrofitModule if we have requests with a different BaseUrl? Thanks.

[@codingwithmitch]

Ya with retrofit you must

[@aliakkawi4759]

@@codingwithmitch Thanks a lot!

[@alexandresantos8232]

I have a question, how do we do this if you're using more complex data classes, for example imagin if "Blog" had another class inside, how would we deal with the data relations?

[@ismailkassim6325]

Can you do a video on safe args with fragment.

[@AnasTariqKhan]

Hey Mitch, first of all, a very helpful tutorial, Just a question, what's the use of caching here? because if the network API fails then we're not retrieving from cache?

[@codingwithmitch]

Just a simple example. Obviously there should be more detailed error handling

[@ankitdubey9560]

Should we observe to database directly in viewmodel, and also call the API. Atleast everytime the loader will not be displayed if data is already in db. However caching functionality is not clear to me.

[@minaisaac507]

thanks alot for your sincere effort, ...but I have a question : why do you provide MainRepository through Module while you own it's class so you can easily provide it through constructor injection...shouldn't we use constructor injection whenever possible?

[@codingwithmitch]

Ya you could have. I don't know that it matters which you use.

[@rajnikantpandey709]

Hi , at 44:47 min , you said that "i'm not adding @Inject at the constructor of MainRepository , i will provide this in module" but why cann't you do there only by putting the @Inject annotation , why do we need to create a seprate module for that and while i'm trying to put @Inject annotation in constructor itself , its throwing me error.

[@javidsattar281]

that's good