#7 - BLoC to BLoC Communication - StreamSubscription, BlocListener & More Architecture Tips

  Рет қаралды 45,655

Flutterly

Flutterly

Күн бұрын

Пікірлер: 196
@Flutterly
@Flutterly 3 жыл бұрын
Hello, everyone! The entire course is now live on Udemy too, get it while it's hot --> www.udemy.com/course/bloc-from-zero-to-hero/?referralCode=E689592633984B34DBEF Also I have just managed to finally finish the entire BLoC - From Zero to Hero Complete Course, based on this tutorial series. You can check it out here -> kzbin.info/www/bejne/inmmnJ6HYrtkY5o
@m4sterkg
@m4sterkg 3 жыл бұрын
Hello @Flutterly , I have a problem is it good to use package GetIt with flutter_bloc ? I have a problem with bloc to bloc comunication. the bloc B get another instance of BlocA so events int BlocA are not listen in bloc B.
@АртурЗарипов-ю9п
@АртурЗарипов-ю9п 4 жыл бұрын
This is the first explanation of bloc to bloc communication in all of KZbin. So good tutorials! How long have we been waiting for you, Flutterly!
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much!
@acavals8080
@acavals8080 3 ай бұрын
I started to watch the tutorial to get know more about Bloc, but I'm learning so many good practices. Big kudos!
@VishalPatel-en6ze
@VishalPatel-en6ze 2 жыл бұрын
As I pray to GOD plz clear out my doubt of BLOC, because i tried to search on the internet. He said I haven't time for that but let me share the Flutterly tutorial for that. 🤣 Thanks, brother for Lifting me up.
@mallikarjunreddy5229
@mallikarjunreddy5229 4 жыл бұрын
May be am the only one who watched the entire series continously without a break 😀❤
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much!
@captain_m7362
@captain_m7362 4 жыл бұрын
i too.
@tajmadhu
@tajmadhu 3 жыл бұрын
I too, it is like unfolding the clarity on bloc, could not stop :)
@rickycoates3003
@rickycoates3003 2 жыл бұрын
No you are not I watched all the Dart and all the bloc in a single day xD
@eenvoo
@eenvoo 4 жыл бұрын
i was using Change Notifier for a long time, but i decided to use BloC/Cubit combinations for new projects. You changed my mind :D Thank you, keep doing awesome videos!
@Flutterly
@Flutterly 4 жыл бұрын
Nice! Really glad I could help you towards this!
@manzoorahmadfarmani8475
@manzoorahmadfarmani8475 4 жыл бұрын
before this playlist i watched multiple videos even udemy courses but this playlist is the best. again thanks
@shogi23
@shogi23 3 жыл бұрын
The best tutorial so far that exists in the whole network
@junewong6086
@junewong6086 4 жыл бұрын
please continue to make more video like this, you are the best teacher of flutter in KZbin
@Flutterly
@Flutterly 4 жыл бұрын
Thank you, I appreciate!
@heisamalali3987
@heisamalali3987 4 жыл бұрын
Thank you man! I was using getX package but with these videos you changed my mind! Keep going on
@Flutterly
@Flutterly 4 жыл бұрын
Thank you! I appreciate it! ♥
@hasan_eke
@hasan_eke 2 жыл бұрын
I had so many preconception about BloC but on every video you crashed them all and now I 'love' BloC. Thank you so much!
@shashan5900
@shashan5900 4 жыл бұрын
Hats off one of the best series on bloc Keep them comming boss 💙
@Flutterly
@Flutterly 4 жыл бұрын
Thanks, man! I will!
@dutnorshi
@dutnorshi 4 жыл бұрын
Great tutorial! There are a lot of documentation and videos, but you one of that types of guys who really have that kind of sight: "where _really_ bloc users stuck", "what _really_ to do to solve it". Your in-depth explanations are great. Personally I find StreamSubscription the more "right way" to do, because you just open BlocA source and clearly see it's communicating with BlocB. With BlocListener: you just open SomeScreen source code, see state and events from/to different blocs in the BlocListener and it's easy to overlook what events of what blocs are called. Anyway, generally, either way are ok :). Waiting for the new video :) Understanding what is buildcontext isn't simple when you meet it first time and what's really going on when your widgets are building, navigator push new pages, some of your widgets crashes the app because you don't apply the Builder, etc :) Thanks for your work!
@Flutterly
@Flutterly 4 жыл бұрын
God, thank you for this amazing in depth feedback! I do really appreciate that you understand the way I structure all my videos! Thanks a lot! I am glad I could help and really pleased that you're one of my viewers!
@mobilexdev
@mobilexdev Жыл бұрын
im not an english native speaker, but i can understand you perfecly.thanks!
@barcode6297
@barcode6297 3 жыл бұрын
These turtorials are getting better and better! I'm very happy that I found these turtorials! Keep up the gud work!
@Flutterly
@Flutterly 3 жыл бұрын
Thank you a lot!
@mallikarjunreddy5229
@mallikarjunreddy5229 4 жыл бұрын
Clean and neat explanation on each and every point, Even though I was working with bloc since from long time, you have cleared me a lot of doubts, hats off to your teaching skills, looking ahead for further videos ❤.
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much for your kind words! I'm glad I could free you of some of your doubts! Thanks!
@waheedhussainhaans8176
@waheedhussainhaans8176 4 жыл бұрын
Thank you for changing my mind towards bloc. I always though it is too difficult for me but you changed my mind
@Flutterly
@Flutterly 4 жыл бұрын
Glad I could help!
@farseenabdulsalam6246
@farseenabdulsalam6246 3 жыл бұрын
Nicely explained :) I'd say that BlocListener approach does move some business logic into the UI though. I think that the connection between two components of the business logic is a part of the business logic.
@reggieeditz
@reggieeditz 2 жыл бұрын
I love your videos man.. really changed my perspective on Flutter development. Such a powerful tool
@MiguelAngel-pz8qi
@MiguelAngel-pz8qi 4 жыл бұрын
The best tutorial so far that exists in the whole network on flutter_bloc in flutter, great job, I do not speak or write English, but I understood perfectly, thank you, I needed this!
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much! ✨
@alialmbaree868
@alialmbaree868 3 жыл бұрын
It's so rare to find such an organized tutorial and so detailed to, thank you so much, I needed to learn bloc for my app and you made it so easy🌹
@frankdomburg3971
@frankdomburg3971 4 жыл бұрын
Excellent stuff, this. I do feel that the speed with which you talk is on the fast-side, and getting faster. Starting to feel the need to reduce the playback speed of KZbin
@Flutterly
@Flutterly 4 жыл бұрын
Thank you for your feedback! Yes, I know that in this tutorial I increased the speed of my explanations but that's because it was a lot of code instead of plain animations. Will get back to my default speed next time. Thanks!
@farhanahmad-bv1mx
@farhanahmad-bv1mx 10 ай бұрын
All videos on bloc are awesome sir ❤,
@rsajdok
@rsajdok 4 жыл бұрын
Definitely, I prefer a BlocListener instead of a StreamSubscription. I implemented an internet connection in the same way as you did.
@Flutterly
@Flutterly 4 жыл бұрын
Glad we're on the same road haha! Thanks for the feedback!
@soheibbettahar1996
@soheibbettahar1996 4 жыл бұрын
Thanks alot man, You are the best who ever explained bloc architecture. I'm looking forward for more tutorials.
@Flutterly
@Flutterly 4 жыл бұрын
Thank you, I'll make sure to keep them coming!
@techstudio7331
@techstudio7331 4 жыл бұрын
Thankyou, I mean it. Thankyou from my heart. You sir are a Gem!
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much for your kind words!
@dreamdev4715
@dreamdev4715 3 жыл бұрын
best series ever good explanation of Bloc and cubit. if you can make riverport flutter series will be appreciated👍
@himanshugupta3897
@himanshugupta3897 4 жыл бұрын
I loved all your videos. The only problem I faced was I wanted to learn Bloc but I got confused between Bloc and Cubit. I though you would make individual end to end project with bloc and another project with cubit. But rest assured, dude your videos are eye-openers.
@Flutterly
@Flutterly 4 жыл бұрын
Man, as I mentioned in my videos, cubit is just a smaller version of bloc, but in general, it's almost the same concept. Will cover bloc in the next series when I'll be developing real world apps with bloc and Flutter!
@himanshugupta3897
@himanshugupta3897 4 жыл бұрын
@@Flutterly I am so eagerly waiting for your next set of videos. Meanwhile, I will be watching all of them again from the start. Thank you for taking note. :)
@farhanahmad-bv1mx
@farhanahmad-bv1mx 10 ай бұрын
Please make more videos on flutter with such deep knowledge
@sergeymonastyrnyy1096
@sergeymonastyrnyy1096 4 жыл бұрын
Very good tutorials. I hope some more are coming soon. Thank you very much
@Flutterly
@Flutterly 4 жыл бұрын
For sure! Thank you so much for your feedback!
@mfoodhub4167
@mfoodhub4167 4 жыл бұрын
Nice Tutorials mate, keep it up, BlocListner my preference
@Flutterly
@Flutterly 4 жыл бұрын
Thank you, glad I could help!
@abdulbasitsaeed264
@abdulbasitsaeed264 2 жыл бұрын
I enjoy both approaches. I use either based on the requirement.
@nick0c
@nick0c 4 жыл бұрын
This series has been great. Thank you. I'm looking forward to seeing a whole project aimed at production ready architecture and some more advanced topics. I'd buy that on udemy!
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much! I will do a whole project aimed on this topic, and I'll post it here, on KZbin, so that everyone will have access to it for free.
@nick0c
@nick0c 4 жыл бұрын
@@Flutterly that's awesome. When you do I'll be sure to buy you a coffee.
@yaroslavmakarov2218
@yaroslavmakarov2218 4 жыл бұрын
Great videos, mate! I'm waiting for the next ones!
@Flutterly
@Flutterly 4 жыл бұрын
Coming soon!
@earthrelated
@earthrelated 3 жыл бұрын
Esti cel mai bun bro!
@ivanyoed
@ivanyoed 2 жыл бұрын
Amazing video about bloc to bloc communication.
@amansingh.h716
@amansingh.h716 2 жыл бұрын
the second approach is very good for me thanks for awesome videos
@sachinwalunjakar8854
@sachinwalunjakar8854 2 жыл бұрын
thank you for making this video, its really help me a lot.
@captcha1337
@captcha1337 Жыл бұрын
For those who are having issues with "context.bloc" throwing an error "isn't defined" : context.bloc and context.repository are deprecated and replaced with context.read and context.watch. Hope it will help someone.
@adilsyoutube6451
@adilsyoutube6451 Жыл бұрын
thanks alot❣❣❣
@oyakitori
@oyakitori 4 жыл бұрын
Interesting video, thanks. I think in larger applications, you will want to use a BlocObserver to do complex coordination, like triggering refreshes based on a state change. I also use it to let blocs “post” events to be picked up by other blocs. Anyway Keep up the good work.
@Flutterly
@Flutterly 4 жыл бұрын
It depends of what you need, mate! Indeed you may use BlocObserver to both listen and rebuild the UI. When you said that you use it to let blocs "post" events to be picked up by other blocs, I guess you meant to say listen to a blocs stream of states and then make other blocs add events based on that states. If so, yes, as you said you could use BlocListener or BlocObserver for that.
@WiLL-by5sw
@WiLL-by5sw 4 жыл бұрын
Thanks man! I really love your video about Bloc! It helps me alot :)
@Flutterly
@Flutterly 4 жыл бұрын
Glad you liked them!
@iNFiNiTY-yf3rk
@iNFiNiTY-yf3rk 4 жыл бұрын
Another great explanation!
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much, I'll keep 'em coming!
@krishilreddy8386
@krishilreddy8386 2 жыл бұрын
This is a great tutorial. Thanks
@WiLL-by5sw
@WiLL-by5sw 4 жыл бұрын
awesome videos! Thank you for sharing!
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much! ✨
@AnandiChovatiya
@AnandiChovatiya Жыл бұрын
always graceful
@diegoarmandocastroaurora4941
@diegoarmandocastroaurora4941 4 жыл бұрын
Excelente video como siempre :), gracias por compartir tus conocimientos.
@Flutterly
@Flutterly 4 жыл бұрын
De nada! Me alegra que te haya gustado!
@GKlyf
@GKlyf 3 жыл бұрын
Thank you for the great tutorial, I hope you keep making more because this was so clear and informative. Nice touch with the pros & cons , I never saw that coming!,😃 :) . I do have a question, I would like to make tutorials but not as videos. I prefer writing articles , I would like to know if there is some sort of technique you use to structure your content so that the reader/watchers understand clearly ?
@Flutterly
@Flutterly 3 жыл бұрын
Hi! Thanks for the amazing feedback! Unfortunately, my type of content takes a ton of time to design and create. First of all I manually write the entire script, then record myself, then based on that script I have to create all these amazing animations, then the coding process, then merge everything all together etc
@1dhoom11
@1dhoom11 4 жыл бұрын
thats is a lot of very good information thank you it helped me a lot, keep it going :)
@Flutterly
@Flutterly 4 жыл бұрын
Thank you, I will!
@MrJerikoSalivan
@MrJerikoSalivan 4 жыл бұрын
Awesome video!
@Flutterly
@Flutterly 4 жыл бұрын
Thanks!
@vgeniirshf8913
@vgeniirshf8913 3 жыл бұрын
Thank you very much for your work!
@Flutterly
@Flutterly 3 жыл бұрын
You're welcome! ✨
@mahdizolfaghari9127
@mahdizolfaghari9127 Жыл бұрын
great and we are waiting for new tutorials
@alparslantopbas
@alparslantopbas 4 жыл бұрын
Excellent, thank you.
@Flutterly
@Flutterly 4 жыл бұрын
Glad you enjoyed it!
@farhanahmad-bv1mx
@farhanahmad-bv1mx 10 ай бұрын
Absolutely great
@adeelzahid9622
@adeelzahid9622 3 жыл бұрын
very appreciated 👌👌👍👍💕💕
@Flutterly
@Flutterly 3 жыл бұрын
Thank you so much!
@xcodesnippets863
@xcodesnippets863 4 жыл бұрын
Wow great explanation as always. Btw are we gonna get a repository tutorial as well coz that would be wonderful
@Flutterly
@Flutterly 4 жыл бұрын
Repositories will come later mate, I need to finish tutorials first. Repositories are mainly related to app development in general and not really related to bloc. You'll have to wait couple more tutorials unfortunately. But it's worth the wait.
@xcodesnippets863
@xcodesnippets863 4 жыл бұрын
@@Flutterly I am more than happy to wait for everything you have in store for us :)
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much for your kind words! Appreciate it! ♥
@domonuch
@domonuch Жыл бұрын
After completing your Dart course, I have been going through this course and it is absolutely fantastic. I do have a question though that I cannot seem to reconcile if you can help at all. At timestamp 13:32, you create a the MultiBlocProvider and put the Blocs in dependency order. Although above this in the tree you pass the AppRouter file as an argument to MyApp and AppRouter creates an instance of counterCubit. If this is created in the AppRouter how is it passed down the tree? I am trying to figure out how you get that specific instance since it looks like we create a new instance in the MultiBlocProvider. Thanks again for the fantastic content though! You have been a dream to learn from and can't wait to see what else you have in store for us!
@amirtabasi1498
@amirtabasi1498 4 жыл бұрын
thank you very much :)
@Flutterly
@Flutterly 4 жыл бұрын
You are welcome!
@captain_m7362
@captain_m7362 4 жыл бұрын
love you flutterly
@muhammadmusa2698
@muhammadmusa2698 3 жыл бұрын
just awesome just awesome
@Flutterly
@Flutterly 3 жыл бұрын
Thanks, man!
@latsabidzeb
@latsabidzeb 4 жыл бұрын
Another great video! Most of the enterprise apps have one to many relationship objects. I was building functionality for adding, updating and viewing such object. for example invoice where you have parent object with list of child objects. Adding child into parent objects list or updating is quiet tricky! I have tried several approaches but didn't like any of them. What would you recommend? would you create 2 blocs one for each screen or one ? or even more? what relationships would you use ? Best Regards,
@Flutterly
@Flutterly 4 жыл бұрын
In general, you should create a bloc for each major feature of your app. I had a similar example to what you're saying when I was working on an app of mine. In general, you should make a bloc/cubit for the big image of your feature. For example, if you have a Country model and a couple of other things related to countries to display, I would create a country bloc to manage all of them.
@latsabidzeb
@latsabidzeb 4 жыл бұрын
@@Flutterly thanks a lot! By the way is that project open source?
@Flutterly
@Flutterly 4 жыл бұрын
Unfortunately, no
@renanmendes35
@renanmendes35 3 жыл бұрын
I'm facing a similar problem right now. My decision was to made 1 bloc that will trigger new states whether the whole object changed or only one of it's children, and inside the BlocBuilder use the method "buildWhen" so the widget can use compare and decide by itself if it should rebuild or not. For example, if you have 10 items (and therefore 10 widgets) and each of one get an index, you could do something like this: buildWhen: (oldState, newState){ myOldItem = oldState.items[thisWidgetIndex]; myNewItem = newState.items[thisWidgetIndex]; return myOldItem.name == myNewItem.name; //You could do complex testes here and return a boolean with true to rebuild the screen or false. Here I'm assuming you are interested in the name property. } New state is the Current state by the way, I only call them like that because it feel easier lol.
@oguzcc
@oguzcc 4 жыл бұрын
Thanks!
@Flutterly
@Flutterly 4 жыл бұрын
Welcome!
@حسينش-ك7ج
@حسينش-ك7ج 3 жыл бұрын
you are superhuman
@Flutterly
@Flutterly 3 жыл бұрын
Haha, thanks for commenting on all of my videos 😂
@emirhan2070
@emirhan2070 2 жыл бұрын
internetCubit.listen gives error. It says, The method 'listen' isn't defined for the type 'InternetCubit'. What can i do?
@keremkeskin8477
@keremkeskin8477 2 жыл бұрын
I have the same issue. Did you solve it? How can we listen to a Cubit Class?
@emirhan2070
@emirhan2070 2 жыл бұрын
@@keremkeskin8477 Videonun ilerleyen kısımlarında dinlemeyi çok daha kolay hale getiren bir yapı gösterecek. Önceden dinlemek için kullandığın kısımları sileceksin. Izlemeye devam et şimdilik
@keremkeskin8477
@keremkeskin8477 2 жыл бұрын
@@emirhan2070 Tamamdır teşekkür ederim onu kullanırım artık. Bu arada hatayı çözdüm demin. Hata aldığımız listen yerinde araya stream ekleyince sorun çözüldü. Alt yorumlarda buldum çözümü. internetCubit.stream.listen((){}) yapınca.
@emirhan2070
@emirhan2070 2 жыл бұрын
@@keremkeskin8477 Bunu bilmiyordum, teşekkür ederim bilgi için.
@delmontee
@delmontee 10 ай бұрын
@@keremkeskin8477 Thanks. Yes changing internetCubit.listen to internetCubit.stream.listen fixed it.
@ashrafal_mekhlafi
@ashrafal_mekhlafi Жыл бұрын
thank you From yemen
@anne_london
@anne_london 4 жыл бұрын
you are awesome... thank you.
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much!
@saliouseck4263
@saliouseck4263 3 жыл бұрын
thank's very helpful
@heavy5756
@heavy5756 3 жыл бұрын
Hey Flutterly, first of all, thank you so much for this tutorial series around BloC, i have learned a lot with these videos. But, i want to know which tools did you use to produce this kind of animations in your videos ? I'm asking because i'm thinking about produce some tutorial videos and these kind of animations are very good to explain some complex topics, thank you very much in advance :)
@Flutterly
@Flutterly 3 жыл бұрын
Thank you for your appreciation! I'm using videoscribe:)
@CryptoWulfApp
@CryptoWulfApp 4 жыл бұрын
Your videos are always great! I dont like bloclistener for this usecase because this composes business logic on the presentation layer.
@Flutterly
@Flutterly 4 жыл бұрын
I just mentioned in the video that what you're saying it's absolutely not right. Business Logic = how we do stuff inside our app. All we do inside bloc listener is notifying bloc what do do, not how to do it. That's why there's nothing related to logic. Please watch the entire tutorial next time.
@gerardsimons3757
@gerardsimons3757 3 жыл бұрын
Excellent video once again! I was just wondering though: Is it also okay to have a BLoC that just communicates to another BLoC by sending it events? Like in my case I have a AnnotationBloc that handles annotations on data. It needs to notify the DataBloc that the data has changed and should be saved to disk. Annotation depending on a DataBloc makes more sense as you could have Data without annotations but not the other way around ...
@Flutterly
@Flutterly 3 жыл бұрын
Yes, you can communicate with other bloc by giving it events to process
@TheMyshreyash
@TheMyshreyash 4 жыл бұрын
I was looking for this content thanks a ton for this. Can u please make a video on how can we change the ui when we want the same bloc or cubit state which is already present but the data provided to state is different for example increment a variable coming from a api on click of button
@Flutterly
@Flutterly 4 жыл бұрын
Thanks! I will cover this topic in future videos for sure!
@franfox
@franfox 3 жыл бұрын
Nice video! For some reason I'm having a problem with the InternetCubit because it starts on the InternetLoading state and if I don't change the device connection mode it still forever in the circular progress... is like InternetCubit never starts by itself. Any advice?
@franfox
@franfox 3 жыл бұрын
For anyone with the same problem the error was on refactoring the monitorInternetConnection in the InternetCubit because instead of creating a StreamSubscription monitorInternetConnection() I've created a void function that don't return nothing 😓
@keithbacalso9433
@keithbacalso9433 3 жыл бұрын
Hi Flutterly pleas answer, I am still confuse about builder and listener in BLoC you said that "Listener will listen to the bloc's or cubit's state change", but when I saw your code : BlocBuilder( builder: (context, state) { if (state is InternetConnected && state.connectionType == ConnectionType.Wifi){ return Text("Wifi); ....... ....... ) QUESTION: you said that "Listener will listen to the bloc's or cubit's state change", but why use BlocBuilder here instead? I am confused because the if statements got access to state...
@Flutterly
@Flutterly 3 жыл бұрын
Both listener and builder listen to the state change. As I mentioned multiple times, you should use listener when you want to do something in response to a state change, like navigate to a new screen, show a snackbar etc. When you just want to rebuild a part of the UI, use BlocBuilder, because that is going to re-built it. BlocListener is not going to re-build anything.
@vaibhavgoel5178
@vaibhavgoel5178 3 жыл бұрын
Thank you for the amazing videos sir, but I am not able to grasp concepts that well since I am newbie and have just finished basic angela yu flutter course. What shall I do or practice to strengthen my concepts as I don't have much experience in fluteer or any other app development.
@muthukumar8009
@muthukumar8009 4 жыл бұрын
Well explained, By listening the internet state stream say I want to redirect to a different page when connection is down and once connection is back online I want to redirect to login or home page. Where should we handle this or what would be the better approach
@Flutterly
@Flutterly 4 жыл бұрын
You can use BlocListener and Navigator.of(context).pushNamed(theRouteYouWant) as a response to multiple internet states. What you can also do is rebuild the UI on your current page to let the user know that there is no internet connection, by perhaps displaying a snackbar or something like that.
@muthukumar8009
@muthukumar8009 4 жыл бұрын
@@Flutterly Got it
@admincreatives4242
@admincreatives4242 4 жыл бұрын
Thank you ...
@Flutterly
@Flutterly 4 жыл бұрын
You're welcome!
@oguzcc
@oguzcc 4 жыл бұрын
we are waiting for new videos man
@Flutterly
@Flutterly 4 жыл бұрын
Yes, the next video I'm preparing it's going to be quite complex, that's why it's taking so long. Sorry for that!
@oguzcc
@oguzcc 4 жыл бұрын
@@Flutterly it was just a joke buddy. ;)
@amirmirzababapour6016
@amirmirzababapour6016 8 ай бұрын
Because blocs expose streams, it may be tempting to make a bloc which listens to another bloc. You should not do this. it creates a dependency between two blocs. Generally, sibling dependencies between two entities in the same architectural layer should be avoided at all costs, as it creates tight-coupling which is hard to maintain. Since blocs reside in the business logic architectural layer, no bloc should know about any other bloc. A bloc should only receive information through events and from injected repositories (i.e., repositories given to the bloc in its constructor). If you’re in a situation where a bloc needs to respond to another bloc, you have two other options. You can push the problem up a layer (into the presentation layer), or down a layer (into the domain layer). - from the bloc documentation
@Baraka0369
@Baraka0369 3 жыл бұрын
Hello there, first thank you so much ! But i have an issue Let's say we want to create 2 Bloc with a global access So we're gonna create 2 BlocProvider inside a MultiProviderWidget But what if BlocB needs to listen to BlocA ? We cannot passe BlocA as a constructor parameter of BlocB because context.read will return an error..... :( How can we achieve that use case ? :(
@Baraka0369
@Baraka0369 3 жыл бұрын
Here is the code in order to help u better understand the issue : void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MultiBlocProvider( providers: [ BlocProvider(create: (_) => AuthCubit()), BlocProvider( create: (_) => UserCubit(authCubit: context.read()), ), ], child: App(), ); } }
@Flutterly
@Flutterly 3 жыл бұрын
Please watch the next tutorial about BuildContexts and you'll understand where the mistake in your code is. :)
@Baraka0369
@Baraka0369 3 жыл бұрын
@@Flutterly Wow, thank you so much, I just need to use the context userCubitContext in the create method....... Thank you !!
@정지헌-b9u
@정지헌-b9u 4 жыл бұрын
Thank you for the awesome explanation! Your course is so organized and easy to approach :) I have some questions regarding to BLoC implementation to my app. Can I email you in some way? I would very much appreciate your advice for state management.
@Flutterly
@Flutterly 4 жыл бұрын
You can ask whatever questions you have here, I'm not that active on other platforms.
@정지헌-b9u
@정지헌-b9u 4 жыл бұрын
I have two questions for you. 1. Routing I am trying to create a quiz app that has (1) a landing page, (2) login page, (3) signup page, (4) home page. Currently I'm using SharedPreferences to navigate through (1) ~ (4) at the initial startup. But I am wondering if there would be more elegant way of routing this procedure. I have sth in mind using BlocProvider to bring the user auth data from the start of the app and use the auth data to decide whether to procede into (4) or (2). Any advices for this? 2. BLoC design Since it is a quiz app that brings data back to the app using http , I am guessing the app requires an User bloc for user data , Internet bloc for online connectivity, Auth bloc for auth, Quiz bloc for quiz data. Am I designing it the right way? I am getting kind of confused right now. I am understanding bloc as a way of designing data logics that controls the app's state. Thank you, and have a happy new year :)
@Flutterly
@Flutterly 4 жыл бұрын
1) You should use an AuthenticationBloc or Cubit to manage the state of the user, and then rebuild the UI (push your desired pages into the navigation stack) based on whether the user is a guest, authenticated, logged out, etc.
@Flutterly
@Flutterly 4 жыл бұрын
2) You are right with everything you said here. Happy New Year!
@정지헌-b9u
@정지헌-b9u 4 жыл бұрын
@@Flutterly Thank you, wish you the best. I will keep looking forward to your videos. Take care :)
@ujjwalbiswas8400
@ujjwalbiswas8400 4 жыл бұрын
what is the extension you are using to view the line for flutter widget?
@Flutterly
@Flutterly 4 жыл бұрын
I don't think I remember how I activated that, but I'm sure it was something in the vscode settings for the Dart analizer. Google it, you might find the answer on Stackoverflow
@ujjwalbiswas8400
@ujjwalbiswas8400 4 жыл бұрын
@@Flutterly I found it thanks for your valuable time, It's called Flutter Guides on Flutter Extensions for VS Code
@Peyman_Rahi
@Peyman_Rahi 3 жыл бұрын
🌱🌿🌹
@tribeworld5360
@tribeworld5360 4 жыл бұрын
*bows to the oracle of bloc
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much, man! ✨
@FLUTTER_HUB
@FLUTTER_HUB 10 ай бұрын
i prefered bloc listener communication if code reality can increase by adding some comments and nameing
@muthukumar8009
@muthukumar8009 4 жыл бұрын
if we want to implement a language change full application whenever user selects given option, how should we use the bloc, appreciate your support
@Flutterly
@Flutterly 4 жыл бұрын
That's a more complicated topic, I don't know how I can implement that currently, but I guess in the future I'll make a tutorial on it.
@muthukumar8009
@muthukumar8009 4 жыл бұрын
@@Flutterly Sure, Thank you
@mertdogan5667
@mertdogan5667 3 жыл бұрын
Thanks
@Flutterly
@Flutterly 3 жыл бұрын
You're welcome! ✨
@rickycoates3003
@rickycoates3003 2 жыл бұрын
I think if you need to both, notify the user through a Dialog and at same increment you can should use Bloc listener since you will make it anyway, if not it's better to use stream and keep buissness logic away from ui
@oguzcc
@oguzcc 4 жыл бұрын
buddy i will ask you something. bloc or getx? which one is better
@Flutterly
@Flutterly 4 жыл бұрын
I'm a huge fan of bloc so I'm a little bit biased towards it. I haven't tried getx so I can't give you the answer you're looking for. To me, bloc library is all you need.
@oguzcc
@oguzcc 4 жыл бұрын
@@Flutterly Ok. Thank you.
@Ayan-od8hk
@Ayan-od8hk Жыл бұрын
Wow
@dudubaiao
@dudubaiao 4 жыл бұрын
The BlocListener seems shorter but then we are putting a lot of business logic on the UI.
@Flutterly
@Flutterly 4 жыл бұрын
I just explained inside the video why you're wrong considering BlocListener to be business Logic. It's a wrong assumption.
@nobodydoe
@nobodydoe 3 жыл бұрын
@@Flutterly Well, you can call it "Unbusiness logic" if you want, but the guy has a point here :-) Wouldn’t it be great to use something like Get_it package as a service locator in this case? Thanks for your work, all my likes go to you 👍🏼
@Flutterly
@Flutterly 3 жыл бұрын
Man, with all due respect. All BlocListener does is doing something as a response to a state change. Nothing more. It's like calling bloc.add() on an onPressed button function. It seems like we're adding logic while dispatching a new bloc event, but the truth is dispatching bloc events are part of bloc, therefore no logic is here.
@Flutterly
@Flutterly 3 жыл бұрын
What is mean is that there is no difference between calling bloc.add() or cubit.increment() as a response to a state change. I don't consider it logic, since the logic (the implementation itself) is actually inside the increment function. However, I am not a fan of BlocListener too, I like StreamSubscriptions better! ✨
@nobodydoe
@nobodydoe 3 жыл бұрын
@@Flutterly ok, I see your point, thanks. There's no silver bullet I guess. All in all it's up to a developer's taste.
@learnwithsajjat
@learnwithsajjat 3 жыл бұрын
How to Bloc Listen Stream List method
@Add0w
@Add0w 4 жыл бұрын
the author of this pack made some nice changes in v6.1.x if u can address those changes with real examples would be excellent thanks.
@Flutterly
@Flutterly 4 жыл бұрын
Yes, I will. Thanks!
@erthill2269
@erthill2269 Жыл бұрын
Bloc documentation clearly states that this kind of tight-coupling blocs and creating dependencies should be avoided at all cost. Also it is really bad for testing
@wajahatali1308
@wajahatali1308 2 жыл бұрын
Damnnnn, Pls control the speed. You are going wayyy tooo fast.
@manzoorahmadfarmani8475
@manzoorahmadfarmani8475 4 жыл бұрын
i think blocListener is easy to used
@imankamali5799
@imankamali5799 3 жыл бұрын
These tutorials were very useful, but incomplete...
@Carlsocial
@Carlsocial 4 жыл бұрын
Thanks for this! looking forward to see more. Is this how the example would be structured for BLoC instead of cubit? pastebin.com/B71kR3ab
@Flutterly
@Flutterly 4 жыл бұрын
Yes, exactly!
@Add0w
@Add0w 4 жыл бұрын
If I could give you 1m views I would.√
@Flutterly
@Flutterly 4 жыл бұрын
Thank you so much, man! Hopefully I'll get there one day haha
@cristiancruz2223
@cristiancruz2223 2 жыл бұрын
way to much fast
@mohammednirshad2131
@mohammednirshad2131 2 жыл бұрын
internetStreamSubscription = internetCubit.listen((){}); problems: The method 'listen' isn't defined for the type 'InternetCubit'. it throws me an error, could you help me
@rohitsrao
@rohitsrao 2 жыл бұрын
There has been an update to the Cubit class. So it is not internetCubit.stream.listen();
@ottenhaus
@ottenhaus 2 жыл бұрын
@@rohitsrao Thanks man that was helpful ^^
@igroman_0072
@igroman_0072 Жыл бұрын
Hello! Does somebody knows how to pass internet cubit instance that I've just created in one of the MultiBlocProvider BlocProviders. context.bloc() doesn't work now. Should I use BlocProvider.value and create both the Cubits? MultiBlocProvider( providers: [ BlocProvider( create: (context) => InternetCubit(connectivity: connectivity), ), BlocProvider( create: (context) => CounterCubit(internetCubit: /*I have problem here*/), ), ], child: MaterialApp( title: 'Flutter Demo', onGenerateRoute: appRouter.onGeneratedRoute, ), );
@igroman_0072
@igroman_0072 Жыл бұрын
Ok the solution for me was context.read()
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