In one of my previous posts I have described how to implement a ViewModel factory that was able to provide ViewModels with their dependencies injected, e.g. an API client, and it was good enough for me at that time. Later on, thanks to Piotr, we’ve found out even better and simpler approach with an additional…
Kotlin language provides a nice and clean way to handle nullable variables in code so that it is less error prone. Unless you do it all wrong, of course. lateinit modifier Normally, all non-nullable properties in Kotlin classes must be properly initialized. You can do it in several ways: in primary constructor, in initializer block(s),…
Android resolves language- and culture-specific resources based on the system locale setting. This is a desired behavior that makes perfect sense. Despite it’s officially not encouraged you may still need to write an app that allows the user to change its language without leaving it. In this article I will show you one of the…
Since Kotlin becomes more and more popular, especially amongst Android developers (and it’s officially supported by Google), some people decided to compare its runtime performance with Java. After reading a few articles I wanted to test it myself and now I’m ready to share some of my observations and experiences. What is it about? Microbenchmarking…
What are they? Android Manifest placeholders allow you to put variables into the Manifest that is otherwise completely static. Why would you need such functionality? Actually, it depends on your projects. It’s probably most useful when you have multiple build variants with different Manifest configurations. Multiple Manifests Of course, the easiest way to configure Manifest…
In my previous post I described how to implement injectable Android view models using Dagger and ViewModel library from Android Architecture Components. In this post I will show a simple way to unit test the view model created then. You can find the full code in the same repository as previously on GitHub. The structure…
In the following post I’m going to show a simple (almost boilerplate-free) yet powerful implementation of the view models dependency injection on Android using Dagger. If you haven’t read about the latest Android Architecture Components libraries, the MVVM pattern and the ViewModel class yet, please read it first as I don’t explain it here. The…
Docker is a great container platform that helps building a true independence between applications, infrastructure and developers. It provides an isolation which supports building modern continuous integration environments with ease and at low cost. Building Android applications The easiest way to build an Android app is to use Android Studio, but how one can build…
Using vector drawables is often much better than bitmap images for two reasons: they scale without losing definition and you need only one asset file which fits all screen densities. Sometimes I find it useful to create vector drawables by hand in Android Studio using SVG paths. If you are not yet familiar with it,…
React Native is still a hot topic at the company. After spending some time with it, many of us have some thoughts and I think there is still a lot to say about it so I would like to share some of my observations and feelings. This post is going to be extremely subjective so…
