Sharing Code Between iOS and Android Apps - Nicolas Märki, Joseph El Mallah - App Builders 2019

Imagine for a moment that we live in a world where only one mobile platform exists. Where you write your code once, where business people never change their minds… Now wake up. As a company that develops Android and iOS apps, we got the most success using native whenever possible. However, it’s a stake in our engineer’s heart that every feature is implemented multiple times. This can lead to slower development, divergence between platforms and less maintainability. In this talk we will present approaches that we use to share code between iOS and Android. These solutions proved viable in more than 10 apps used by more than 7 million users. We will go through:

  • The cases where sharing code makes sense
  • Different tools and tips that allow C++ as a shared language without dying
  • How Java can also be a candidate for code sharing
  • Alternatives to C++ and Java like Javascript and native Kotlin
  • How native code sharing compares to cross-platform solutions like Flutter

https://www.ubique.ch/en/appbuilders2019/

https://appbuilders.ch

How to Tame Core Animation - Kristaps Grinbergs - App Builders 2019

Core animation is very powerful, yet building visuals with it seems like a hard thing to do. That is mainly due to its complexity and lack of modern resources available. However, there is a good reason to embrace this framework - it is one of the rare ways to make performant animations for Apple devices and there are tools coming to ease up the implementation. In this talk you will learn what is Core Animation and what opportunities it offers. We will learn it with real life use cases. As well presenter will show how to experiment and how to accomplish what designer could ask for.

https://twitter.com/fassko

https://appbuilders.ch

Ship it Safe - Guilherme Rambo - App Builders 2019

Our apps run on the most personal devices people have, it’s our responsibility as engineers to make sure the apps we ship don’t do them any harm, by respecting their right to privacy. In this talk, I’m going to present some key aspects and techniques of building secure and private apps on Apple’s platforms.

https://twitter.com/_inside

https://appbuilders.ch

Onion-like iOS Architecture Solution - Aleksandar Vacić - App Builders 2019

Learn how to architect an entire app – from UI, through user / data flows and transactions down to data storage and delivery – in independent, interchangeable layers. With layers that can be freely combined as needed, with no or minimal disruption to the rest of app. Just like an onion. You will learn that MVC is excellent, if employed properly. You will learn how to use Coordinators without delegates and with truly minimal UIKit extensions. Learn about an approach suitable for iOS teams of one and teams of 1000 developers. For 5 screen apps and for 200+ UIViewController behemots.

https://twitter.com/radiantav

https://appbuilders.ch

Protocol Witnesses - Brandon Williams - App Builders 2019

Protocol-oriented programming is strongly recommended in the Swift community, and Apple has given a lot of guidance on how to use it in your everyday code. However, there has not been a lot of attention on when it is not appropriate, and what to do in that case. We will explore this idea, and show that there is a completely straightforward and mechanical way to translate any protocol into a concrete datatype. Once you do this you can still write your code much like you would with protocols, but all of the complexity inherit in protocols go away. Even more amazing, a new type of composition appears that is difficult to see when dealing with only protocols. We will also demo a real life, open source library that was originally written in the protocol-oriented way, but after running into many problems with the protocols, it was rewritten entirely in this witness-oriented way. The outcome was really surprising, and really powerful.

https://twitter.com/mbrandonw

https://appbuilders.ch

Embrace the WorkManager - Pietro Maggi - App Builders 2019

After all of 2018 spent as alpha and beta, WorkManager graduated in 2019 to its first stable release and it is now the recommended solution for scheduling and executing deferrable background tasks in Android. In this talk we’ll quickly look into which use cases are a good fit for WorkManager, and which are better handled by different tools/APIs. Then we will jump into the API itself covering the different options available, from the simple Worker class to the newer CoroutineWorker. All this with an eye on how you can (and should) test your Workers and how you can implement some of the few missing features that are not yet covered by WorkManager out of the box. With this talk you’ll learn:

  • When to use (and when not) WorkManager
  • Which Worker class to use for your particular use case
  • How to test your Worker classes
  • How to customize WorkManager configuration
  • How to use Dagger2 with WorkManager

https://twitter.com/pfmaggi

https://appbuilders.ch

The Realities of A/B Testing - Aydar Mukhametzyanov - App Builders 2019

A/B testing isn’t just about shipping and learning. There’s also some hard work involved. What if you have several A/B tests running on top of one another? Should you duplicate lots of code or introduce lots of branching? What does statistical relevance even mean? In this talk, I’ll dig into the realities of A/B testing. I’ll discuss how to deal with A/B testing in practice, how to continuously split test an application with a non-trivial number of variants and not go mad, and how to keep your quality standards high. Come find out how to optimally learn from your users.

https://twitter.com/aydarmukh

https://appbuilders.ch

Scaling Architecture at Lyft - Denis Nekliudov - App Builders 2019

Lyft Android was started as a single app with one developer. Now it is more than 50 developers, two apps with shared codebase and tons of features that are releasing each week. The requirement had changed dramatically and now we have many challenges that were not seen in the past. The talk covers evolution and revolutions of solutions in the core structure of our codebase and explains current state and what problems it allows to solve at our scale. Listeners will learn how to prototype initial app architecture in respect of later scale and what kind of solutions are helping to produce a sustainable product.

https://twitter.com/nekdenis

https://appbuilders.ch

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