Substituting Android's LiveData: StateFlow or SharedFlow?
Kotlin Coroutines recently introduced two Flow types, SharedFlow and StateFlow, and Android’s community started wondering about the possibilities and implications of substituting LiveData with one of those new types, or both. The two main reasons for that are: LiveData is closely bound to UI (no natural way to offload work to worker threads), andLiveData is closely bound to the Android platform.We
Flutter Thursday 02: Beautiful List UI and Detail page
In the previous article of thursday flutter series, we made a mobile app dashboard. This will focus on making a list of items and a detail page for each item. As before, I got this design from Pinterest. This will be in two parts. NOTE: as at the time of writing this, I could not get most of the icons used on the original design, so you will see different icons in most places. https://www.pinteres
Flutter Challenge: YouTube (Picture-In-Picture)
Flutter Challenges will attempt to recreate a particular app UI or design in Flutter. This challenge will attempt the Home screen and the Video Detail screen (The screen where the video actually plays) of the Youtube app including the animation. This challenge will be slightly more complex than my previous ones but the result is that much better for the same. Getting StartedThe YouTube app compris
Kotlin coroutines vs RxJava: an initial performance test
Update 07/04/2018: added more clarifications to highlight the purpose of this test and added more details in the conclusion. Update 30/03/2018: the RxJava test has been updated to use Schedulers.computation() and all the tests for both RxJava and coroutines have been executed again. Thanks for all the comments that helped improve the comparison between the different implementations. I was curious
A Guided Tour inside a clean architecture code base.
MovieNight is a sample Android application that uses the clean architecture approach and is written in Kotlin. Before we begin #1This blog post assumes knowledge on the following topics: Kotlin, RxJava, dependency injection, and testing. I did my best to add links for further reading throughout the post. If you come across a subject you’re not familiar with I encourage you to take a pause and read
Introduction to Physics-based animations in Android
Physics-based animation relies on the laws of physics to manifest a high degree of realism in animation. What is Physics-based animation?It’s an animation that is driven by force.Based on the force, acceleration or deceleration can be calculated, which can then be used to calculate and update the velocities and values for the animation at each frame.And finally, the animation comes to rest when th
Enter animation using RecyclerView and LayoutAnimation Part 2: Grids
SeriesEnter animation using RecyclerView and LayoutAnimation Part 1: ListsEnter animation using RecyclerView and LayoutAnimation Part 2: GridsEnter animation using RecyclerView and LayoutAnimation Part 3: Exclude itemsIntroductionThis is the second and final part in the series on how to apply a LayoutAnimation to a RecyclerView. Part 1 covered the case where the RecyclerView is used for a List and
Stress-testing Android apps
Before starting with the recently published Trade Me app for jobs hunters, we spent some time reading and thinking about how we can build a stable app and how to make sure that the quality of the app is maintained over time. I’ll not be covering in this post stuff like having a CI (we use Jenkins), choosing to go with basic MVP, DI (Dependency Injection), mocking HTTP responses, etc… And the value
Android: draw a custom view
IntroductionEvery day we use various applications and despite of their diverse intentions, most of them are very similar or even resemble each other in terms of design. That’s why a lot of customers are requesting specific, customized layouts and appearances that no other application has embodied yet, in order to make the Android application unique and contrast from others. If a specific feature r
Using Kotlin For Tests in Android
Many developers are quite optimistic about Kotlin future for Android. It sounds so sweet: less verbose, more type-safety, zero-overhead null-safety, Java interop. But not everyone is ready to take a risk and start writing production code using new programming language. Indeed, it could be not mature enough and will add dependencies which increase method count of APK for more than 6.5K. But what if
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Configuring Retrofit 2 Client in Android
Concise Error Handling with LiveData and Retrofit
Unit testing reactive network requests using RESTMock