Lucas Goldner
Flutter engineer @ YOUTRUST
Stuttgart, Germany
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24, Enthusiastic Flutter engineer at YOUTRUST. I have specialized in Flutter for 3+ years now and am doing talks on it at various places around the world. Speaking more or less 5 languages, also interested in chatting with various people about Flutter!
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Saving data before the app getting killed! Easy state restoration with Flutter
Imagine this scenario as a user: You are writing a long text in an app, keep switching between various apps, and return to the app, but notice the OS killed it! Now, all your written text is gone. What a terrible UX! How can we, as developers, help the user avoid running into this worst-case scenario? Simply keep and restore the app’s state! We always discuss state management but forget about restoration. For my newest app, "Japanana," I needed to include this feature. So, I will explain the implementation with an actual example. In this talk, I want to:
- Show how to enable state restoration
- Explain the differences between iOS and Android
- Implement the restoration of our app state and discuss various strategies including navigation
- Learn about multiple possibly unheard types such as RestorableInt and RestorableString
- Adjust our tests with this new behaviour
Comparing ways of accessing native functionality
How I came across this topic:
As part of developing one of my apps, I was interested in using the AirPods' sensors for data collection. For this purpose, I wrote a little package: https://pub.dev/packages/flutter_airpods
Which does precisely that. I used an event channel to get the information in real time and process it in my app. It was during the last Flutterforward that I heard for the first time about ffigen, which would have saved me a lot of development time. With ffigen, I can extract the class that provides all the functionality I need, create bindings, and call it directly from within Flutter. This talk will demonstrate the process and compare it to writing a bridge manually.
Takeaways:
- Auto-generate bindings to various languages like ObjC, Rust, and C++
- How ffigen can save a lot of time while developing
- Less maintenance since you can reduce the need for dependency
Fluttercon 2023 Sessionize Event
Lucas Goldner
Flutter engineer @ YOUTRUST
Stuttgart, Germany
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