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n

Nikola Milovic

09/27/2019, 5:22 PM
Hey guys, any github projects that can be a good learning resource for good architecture Mvvm preferably, DI, room etc..
p

Pablichjenkov

09/27/2019, 6:27 PM
j

Jeremy

09/27/2019, 6:34 PM
Agreed. The MVVM+ViewModel that Google promotes has tradeoffs
p

Pablichjenkov

09/27/2019, 6:49 PM
That is correct, be careful with Google's naming. Google named ViewModel a class that basically persist configuration changes like rotation. But it has nothing inside so you start building whatever you want on top of it. The major confusion I see in Google's MVVM+ViewModel is that they treat Fragments as View where many people consider them as Controllers. Specially iOS developers usually map UiViewController to Fragment. Seeing the Fragments as View is fine but then if you start using the Navigation Component. You see most of the samples out there they write Navigation Logic in the Fragments. Meaning your app is driven by Views. It shouldn't, an App should be driven by Business Logic, more scalable. In my personal opinion and what I currently do is treat Fragments as Controllers. Well not really controllers. With the new Navigation API I treat them as Nodes in a State Machine. Each Node/Fragment of the Navigation Graph represents a State in a State Machine. The Nav Graph is my State Machine. Of course there is a lot of workarounds on top of the existing API to make it to work the way it should. But Hopefully Google keeps improving the Nav Graph API in such a way where you can see it more like a State Machine.
☝️ 1
j

Jeremy

09/27/2019, 6:55 PM
Also getting ViewModel working in a MPP app is challenging
And the fact ViewModel don't handle process death so still dealing with fragment, viewmodel and app lifecycle
p

Pablichjenkov

09/27/2019, 6:57 PM
What you mean by MPP app?
Massive Parallel Processing?
😆 1
j

Jeremy

09/27/2019, 6:59 PM
multiplatform
I like your definition
p

Pablichjenkov

09/27/2019, 6:59 PM
oh ok I got you. Yeah right
It was the first that pop up from google 🙂
j

Jeremy

09/27/2019, 7:00 PM
I think in next few years there will be a rethink of architecture patterns and libs if multiplatform becomes mainstream
The patterns and libs Google is promoting don't work in that ecosystem
p

Pablichjenkov

09/27/2019, 7:01 PM
I do agree on that. Although not sure if Apple is gonna like it.
Honestly Multiplatform sounds more like a Eutopic dream than a fact. It's been 10 years of mobile existence and still is on baby steps. Don't know adoption percentage these days but I don't think they any high. Not even Flutter which is pretty decent has shown respect in the market.
j

Jeremy

09/27/2019, 7:35 PM
Yes, but to be fair KN is fairly new and still in beta
KN is the first solution I've encountered that actually solves the problem in a pragmatic way
j2objc is the closest
1
p

Pablichjenkov

09/27/2019, 7:44 PM
Well, I don't mean you can't run multi-platform code. That is not new, in fact you can compile C++ binaries that run on almost every platform out there but the Web. Then you can consume this binaries from the platform through the different APIs like JNI. I think there is some work done for Swift too. However, my point is a Unique Universal API or something closer to this concept. That is not gonna happen any time soon. We can get closer by writing a bunch of platforms adapters to wrap a Universal UI API, that's Flutter. But you still gonna get hit by performance issues and such stuff.
j

Jeremy

09/27/2019, 7:49 PM
Flutter performance is good my issues were def interop with native platform
p

Pablichjenkov

09/27/2019, 7:50 PM
Even making a single app that runs for iPhone and Mac is hard and you are talking about the same language and similar APIs.
j

Jeremy

09/27/2019, 7:51 PM
Yes you def end up w/ a lot of abstractions to make it work
👆 1
👍 1
Best case maybe 20-50% of app code would be cross platform, maybe as low as 5-10%
p

Pablichjenkov

09/27/2019, 7:52 PM
Don't have enough data but apparently Flutter performance is ok. I don't like their
Widget
based API though. I wished they had provided a plain
main()
function as entry point to the program and all the UI painting stuff as a separate library. The same thing for Android Framework though 😸
j

Jeremy

09/27/2019, 7:52 PM
Wrapping the entire sdk and app into a common api is a pipe dream
UI greenfield apps in Flutter are ok but if need a lot of of platform api like legacy code, networking, notification, authentication it gets painful and death by a thousand cuts
Interop with platform in KN is much less boilerplate
1
p

Pablichjenkov

09/27/2019, 7:55 PM
Humm good to know. Haven't experiment with it yet
j

Jeremy

09/27/2019, 7:55 PM
Depending on type of app. Flutter is competing w/ mobile web not true native apps
p

Pablichjenkov

09/27/2019, 7:55 PM
I got to put my Arduino and Raspberry pi to work these days 😁
👍 1
j

Jeremy

09/27/2019, 7:56 PM
I think all solutions can co-exist, no winner take all just like serverside
Python doesn't need to lose for Kotlin to win. Its a big world
p

Pablichjenkov

09/27/2019, 8:05 PM
It is a big world right. Although there is always tech evolution. Learning from mistakes new languages get better and better. Then it starts replacing old ones little by little. Not sure if that statement apply for
C
and
C++
anyways. But the reality is that modern languages look more similar each day and they copy each other good features. There is always elephants in the room
C++
and
Scala
🤣
a

alex009

09/27/2019, 9:44 PM