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Kotlin YouTube: Intro to RecyclerView (Ep 1)
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- Опубліковано 18 гру 2017
- Super excited to bringing everyone the first lesson in the new Kotlin series on building the UA-cam application for Android. Let's start off by learning how to build the most common component in mobile applications: a list. To do this, we implement a RecyclerView component which is the successor to ListView. It can be a little tricky to fully understand how it works, but it should come naturally in just a few tries.
Essentially, RecyclerView enforces the ViewHolder pattern that comes from best practices using ListView. If you want a lesson on that, please watch this video here: • Android Kotlin: Essent...
Getting started with Android Studio:
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Yay! Been learning Kotlin on my own for work and I'm sure this course will be a great resource as usual :)
I found many videos explaining RecyclerView in Kotlin, but yours was by far the best ! THANK YOU !!
Great job! Your clear teaching style at a moderate pace makes this easy to follow.
Thanks, I’ll put more kotlin videos out in the future, maybe a premium course on my website as well.
Favourite tutorial teacher. Glad when you teaching new possibilities also. Awesome effort. Keep it up
I watch this video every time just to conceptualize recycler view for my understanding. Awesome Job!
Congratulation on your new lesson series, Brian. Even though I'm still working on digesting your iOS series but I really hope this series can get on my schedule in the near future.
Your amazing. you clearly put a lot of time and effort in your videos. You have not made a single mistake without telling us before hand that you are gonna make a mistake on purpose. well done.
Excellent, thanks so much! Just what I was looking for. Can't wait for the rest of the series.
This guy does an awesome job of explaining things so damn well
That's an awesome intro tutorial to recycler view. Thanks for the comments and comparisons to iOS Tableview.
Watched so many recycler view videos, this one is Gold
Thanks Brian! I understand now why you start first with ListView, it makes easier to understand the RecyclerView component and also its very helpful to understand when you compare some syntax with Swift language.
Glad someone appreciates the effort.
I was waiting for this series. Thanks,
My lecture suggested me to watch this video! It is just AMAZING! Great JOB, clear explanation
Same here bro
Really great video. Now I understood the concept of recycler view. Thanks
Thanks for each effort you made man !!!
I decide to become an Android developer ,and ur tuts just great ,Thank u )
Your video was super helpful! Thank you.
That's awesome! I love your video explaining! Please make more videos about kotlin.
Thanks! I was waiting for this!
This is the best video on recycler view on Kotlin that I have seen. It's better than all the paid Lynda.com courses and at least one paid Udemy course.
Thank you so much for the explanation!
Excellent, udemy/lynda courses are sometimes taught by people that don't have the passion to explain the nitty gritty details.
Awesome explanation. Thanks a lot
Impressive that you show your screen and face capture :) Most coding tutorial videos need to be highly edited to achieve this quality!
I don't want to be misunderstood but there are many MANY kotlin on android tutorial videos on internet, many have no sound or a difficult Indian accent. English is not my main language so it's hard to understand many of those videos. Also so many of them still use java idioms. This playlist, this channel, it's godsent! Thank you very much. As a Python developer I recently picked up kotlin for a PyPI Browser project. Kotlin is extremely easy to learn but Android API is far from trivial, it's huge, messy and with java it was like drowning in a hell pit. This playlist was 10/10. I'd donate for new episodes.
thanks a lot, I like your tutorial it is easy to follow,
Keep it up bro.
Thanks. This definitely helps people coming from iOS.
Man you are just amazing!!!
Simply awesome man!!
please do some videos on material design too as there aren't any good tutorials for that on youtube
Wow! Brilliant - you make it all look soooooo easy! Thanks
Surprised how simple things are huh? If I wasn’t recording, I think developing android apps is 2-3x faster than Swift
Amazing. It does look a lot more complicated and cluttered...but I know this is the google style... Will maybe give it a go this year. Thanks for all the wonderful videos and trainings - inspirational and excellent
I notice both platforms have their pros and cons, I might eventually hop on over to react native too.
Yes - I have already done some React Native and it is quite amazing to build for both platforms with simple Javascript! Will be exploring this first rather than Native Kotlin....I think...
I might work on a few react native tutorials, seems to be quite easy to code with from the projects I've worked on.
Great Tutorial!!! Thanks so much!!!
Keep this coming!
Thank you again and for this video. This equals a like !
Keep these videos coming...I was using recyclerview with java, kotlin isn't too similar though...If you can get into networking and pulling items from server to populate each card that would be awesome
Thank you bro, real deal tutorial
Still a great tutorial in 2021! Thanks for the help!
Please upload more kotlin series . It will be really helpful. By the way I have learnt a lot from you.
Thank u for this awesome video
Thank you so much Brian
Great Tutorial !!! Thanks
Awesome!
Good stuff! Very clear. Coming from the iOS side, it really does seem like Android makes things a lot simpler.
Same with me. Could you share your learning resources for Android development. For me, I just learning from that channel.
Awesome video keep it up thanks
Short and on point
I want to thank you for the tutorial, you made it pretty simple to understand :D. btw, I had a question, in your app it's possible to search videos with the UA-cam API? It would be great to know how to do it. Thanks for read and help me. :)
very good explanation
Good going pal
Hi Brian
Thanks for this tutorial
It’s very explicit
Now my question is : how do I get the first recycle view to drag me to the second recycle view with the sorted items just like yours; but I’m using a class an data model instead of picaso an json .
I’ve been trying to figure it out for a long time.
I have an mobile app in the app Store called Pin-Core and my goal is to make the same app style in android but this syntax is holding me off
Do you have a tutorial of a search engine in the navbar? to look in a recyclerView? in kotlin? Thank you!
thank you so much!
Thank You!
Thank for really brilliant content you are producing, I have short question, As in iOS why you are not creating Views programatically in Android ?
Pls do a series on firebase for android studio
Good job bruh
For anyone getting that the MainAdapter is not implemented error I got it working by removing the question marks ("?") from the two functions - not sure what this will cause down the line.
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CustomViewHolder {
val layoutInflater = LayoutInflater.from(parent?.context)
val cellForRow = layoutInflater.inflate(R.layout.video_row, parent, false)
return CustomViewHolder(cellForRow)
}
override fun onBindViewHolder(holder: CustomViewHolder, position: Int) {
}
Thanks for using iOS terminology. It really helped me follow along with what was going on. Great Video!
Silly question, but hox to do I enable the "suggestion box popping up at 19:45? Can't seem to figure it out. Thank you!!
Hey man, how do I sort the list by name/alphabetically etc? Been trying to find something on the net on how to do it but can't find anything! I'm trying to sort the Json Arraylist in a later episode.
Brian, could you show how to build an app In-App-Purchase Style for Android please? Thanks.
wow it is amazing video but can i use card view in the place of constraint layout
There is a way to give the string like arguments from the MainActivity?
Sorry, but I do not know how to continue ... everything gives me error, (update the android studio to 3.2 and a disaster ....) I turned a step back and downloaded version 3.0.1 but everything throws me errors, he wants to raise the dependencies to 27 or more ... and before he had everything in 26 ... this is normal? I broke the whole project ... I have backup but they also do not work ... I do not know how to handle ... this is it? that every time android studio uploads an update and everything breaks? Do you recommend something especially so that this does not happen? Thank you! I would appreciate your comments!
Thank you
hello and thanks for your tutorial ,
how i can create my own json api
The reason you need the parenthesis when extending certain classes is because they are abstract, not an interface, thus need to be initialized. :)
For some reason I don't think I'll ever understand the strangeness of kotlin and why the designers chose such unique syntax.
good job thank's
I dun noe if later version of Android Studio has a newer way of doing things. Using v 3.5, its throwing multiple errors and its driving me nuts Any pointers?
Thank you so much,and if there has some other lauguagers just like chinese ,i'll be grateful.
要我讲中文了拍视频吗
Sorry this is out of the topic. What do use like camera and any kind of software for recording your lecture. I am very thankful for you n-depth tutirial
Excellent Tutorial for RecyclerView i ever seen. but what about when rotating the device, and how to handle the recyclerview also when dealing with main image of each item how to keep the aspect ratio of the image, with each portrait and landscape?
Simply using constraints makes it all very easy.
are you gonna be uploading everyday?? so excited for this course can't wait for the next one
Probably not everyday, but this series should be done in about 7 lessons.
this was useful unlike the previous ListView vid xD
Haha cool. I'm really hoping people realize that RecyclerView is nothing more than ListView with the ViewHolder concept forced into it.
spettacolare 3>
Please sir do a series on Complete course of Kotlin for Android
Me watching any android/kotlin tutorial...
Guy: Kotlin is so super easy, saves boiler plate...
Same guy: This is confusing in Kotlin, writes tons of boiler plate...
Me: Gnarf :/
But nevertheless, you make very good understandable tutorials. Thanks for your efforts.
I'm old, and grey, 46yrs, never learned proper programming :))
Hi Brian, I learned a lot from you in the last few months, I need your help, I am using firebase to populate the recyclerview, how do I stop the recycler view from completely refreshing on change of some value in firebase?
I think you just insert something in your adapter.
Thaaaaank you
Nice, I am looking forward to the series! I was learning Swift for 2 years and now I decided to convert my apps to Android but I have written them in Java but Kotlin looks much simpler. How do you like it? Is there enough online support for Kotlin right now?
Overall I find kotlin to be very easy to type with. There are a lot of confusing aspects to the syntax, but googling around has helped a lot. Also knowing Java is going to give you a great head start in adapting.
Thanks for your opinion! I will give it a shot and follow your awesome videos! :)
thanks
I thought you didn't like storyboards(idk the name of the android one). Are you only using it teach easily or is it better than the ios version?
Android layouts are more like xibs, which is ok. You can also easily read xml layout code during code merges. If you haven’t worked at large companies before, you won’t truly understand the evils of storyboards
apple needs to take notice then
I taught as well. Because I was new to swift and you just love creating elements programmatically. I wish you used storyboards tho
Great videos as always
@@LetsBuildThatApp Yes now I understand. Because we always getting merge conflicts here. Now we have to leave all the UI works to one guy
is there like no layout constraint for view in kotlin? programmatically ?
It's all written in the XML file. I use the constraint layout visual editor to make my UI in Android since everything is separated neatly into different files.
Cool tutorial, thanks. And it also highlights how crappy Kotlin syntax is. Yet another convoluted language to deal with.
Perfect example, first time seeing RecyclerView in Kotlin..... am I the only thinking WAY simpler ?
This was excellent! Does the data always have to be inside the Adapter or it can be passed as a parameter?
The data has to be inside the adapter, but yes it's passed in from when you instantiate the adapter. Then you set the adapter to the recyclerview's adapter.
@@abshih is there some example of this with an API call, I am pretty new to this so it would be really helpful. It's difficult to find good Android tutorials.
Hi Brain, I am an iOS Developer having two years of experience, is it good to learn react native or kotlin ?
If you want to stay current then sure learning isn’t going to hurt ya
What do you think about react native and xamarin ?
What are you thoughts on it yourself?
Will you cover how to implement swipe to delete a row on recyvlerView? (please!)
Can you show us what app does this?
Something like this: www.androidhive.info/2017/09/android-recyclerview-swipe-delete-undo-using-itemtouchhelper/ but I got lost trying to do it in Kotlin.
Great website resource for android developers. It's gotta be overwhelming to convert all of that Java code to Kotlin haha.
all instances of "parent" in the MainAdapter.kt are unresolved references. Any suggestions?
Had the same issue. Check the constraints of the onCreateViewHolder function, mine say p0 and p1. If yours says the same then change the code in the function to this
val layoutInflater = LayoutInflater.from(p0.context)
val cellForRow = layoutInflater.inflate(R.layout.video_row, p0, false)
Notice that the parent was changed to p0 and there is no need to have the ? after p0
Hope this helps!
please update to latest tech. this does not work. cannot even access the recyclerView _main in main activity
You funny "Kotlin is confusing for java or swift background" lol I come for procedural c so I don't understand nothing what I am doing but its work lol
What version of Android Studio do you use?
Latest stable release I think is 3.0
OK thank you very much.
A good video.
show de bola
... I can tell you something about the overall development of a project ... I am with a topic that does not allow me to move forward. This happens with Swift and Android ... I'm with the subject of a chat. What I see is that Json does not have much in real time ... and I think that although I advance a lot in development. ... I do not know if I'm traveling the best way. I see that firebase has many advantages ... and I'm thinking of migrating the entire base to firebase. ... what do you recommend ...? the chat for this project is fundamental ... and the notifijaciones push .... I think I'm wrong in forcing it to be handled with json ... currently the base has the client in their Hostings .... and There are 1000 active Members
And if I'm thinking about firebase, because I see it's quite complete ... with real time for push notifications ... and a chat ... is it like that? Would you recommend firebase or another?
Sir Should i focus on android development or IOS development In sense of fututre perspective
definitely Android! but I'm biased :)
nice
u nice
please add onclicklistener on recyclerview tutorial. I need it
The video is on the channel and on the playlist.
Hi man,
I just followed your video twice from start to finish but for some reason it won't recycle my window. All the tekst (First title, second 3rd) is being placed in 1 position after eachother instead of below each other and I also don't get to see more of the android guy image but only one. I know this isn't the best english but do you maybe know what I did wrong?
Greets from the Netherlands
You can download the sample project using the link in the description. You’ll be able to find exactly what the working code is.
@@LetsBuildThatApp ah thanks man!
So stupid, I forgot the apostrophes when writing those ("First Title", "Second", "3rd") Tha's why it didn't show 3 but only one because it read it as one line of text omg hahah
Indeed a silly mistake, but I remember making this exact same mistake a while back too.
I just finished all 6 episodes and learned more than I expected! Along the way I updated the code so that it runs once again (including the latest libraries and the new view binding method as Kotlin synthetics and findViewById are deprecated). It runs on my Samsung Galaxy A7 Lite tablet. I've put it out on github (github.com/Janodi/RECYCLER_VIEW_EXAMPLE) in case someone else might find it useful. The code comprises the completed example through Ep 6. I am new to Android, so it might have been written more efficiently : ) Thank you Brian for a great tutorial.
Thank you so much
Do you understand every line of code you write?
He used to work with android so he has some background, I'm pretty sure he does understand
Yep I wrote a lot of java code back then for server side and android. Kotlin is similar to converting from objc to swift. I might make a video comparing all these languages together.
Looking forward to see comparison video.
Do you understand every line of text you write?
Jörg Klausewitz it wasn’t meant as an offensive comment. Chill
Why am i getting class "adapter"is not abstract and does not implement abstract bas class
And "onBindholder" and "oncreate overrides nothing? Please anyone who knows
You probably want to download the sample code, it should work even if its a few years old.
@@LetsBuildThatApp found my problem after some google search. It turns out i have to remove some "question mark" in the adapter from my code because of the newer update(?). Nice video by the way, subscribed right away 🤣
android using xml , ios code. -.- Why?