Android

Custom Paging for LazyColumn

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Having a paginated stream of data can give you a bit of a headache. AndroidX provides its own paging library, which offers a lot of abstraction. However, I ultimately failed three times and started looking into what other options I had. My Issues with AndroidX.Paging All these issues ultimately stem from AndroidX.Paging’s very closed, strict … Read more

Kotlin Flow tips for ViewModel

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Many months have passed since I last wrote about Kotlin Flow: Domain Model’s StateFlow Sharing. So, let’s take a look at something related to Flow handling in a ViewModel. StateIn shortcut Usually, you want a StateFlow‘s state to survive a configuration change. AndroidX’s default time limit is 5 seconds — but only if it’s subscribed. … Read more

Does Jetpack Navigation meet Type Safety?

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You may have heard that Jetpack Navigation has a new API for type-safe navigation. This new official solution brings navigation with a “destination object” instead of simple manual URL building. Previously, I developed kiwicom/navigation-compose-typed library that did the same and was an inspiration for the official solution. The official solution makes navigation easier than before, … Read more

Page Objects for E2E Android UI testing

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Android end-to-end UI testing is not that difficult, but we have observed that the official API/tooling doesn’t scale much if you have a big app. “Page Object” is a design pattern abstraction over a particular screen: it provides access to read the screen’s data and provides an API to interact with the screen. You may … Read more

Rewriting Android App’s Back-Handling Logic

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Our Kiwi.com app is quite old and vast. It is in development for about 7 years; each year we’re adding more features and code, each year the app is being worked on by more developers. We evolved to a custom back-aware logic in our activities and fragments. Basically, back press was handled in the activity … Read more