3/28/2023 0 Comments Chaning color sudokuI said I would keep this practical, but allow one point. With our review of the old system out of the way, let's explore a much prettier and simpler way to style and theme an Android application. How to Set Up Themes, Colors, and Fonts with Jetpack Compose Not to mention the main API for getting these resources is Context, which is a class you really do not want to leak in memory.Įnter Jetpack Compose. The result for us application developers is most often a lot of boilerplate code, some hacky workarounds for things which intuitively seem like they should be one-liners. Add that they must also try to have new features work on older Android OS versions, and that becomes a very thankless job. The root problem for everyone involved is tight coupling to the View system and the Android resource system (which are themselves tightly coupled together).įor the platform developers, this means they have to build on top of, or work around gigantic and old codebases. I have to write some ridiculous boilerplate code just to change the look of a View (that is, override something defined within resource styles and themes).I want access to a resource in a place where I do not want tight coupling to the platform APIs which provide the resource.This can present difficulties for both platform and application developers. In order to integrate our XML-based resources into our JVM-based application code, we must necessarily have layers of translation (compilation) and platform bridges (APIs). It is merely an observation of how design decisions always have benefits and costs. Please note that this is not meant as a criticism of the platform developers/engineers. Personal preference aside, there is a more technical reason why XML resources are not always ideal. In fact, there are very few things I would prefer to do in XML over a modern, idiomatic, and elegant language such as Kotlin or Swift. While I would never want to manage the boilerplate code necessary for localized string resources myself, that does not mean I enjoy writing XML. This saves us having to write that boilerplate code ourselves. The resource system gives us a place where app developers can provide localized resources which the platform can select for at compile time. Those are just two common examples – there are plenty more. Look and feel proportionate to a wide variety of form factors (dimensions, densities, and so on.).Display text and graphics in a variety of different languages and alphabets.I am referring to the challenge of building apps which: To be specific, one of the greatest challenges for both platform and application developers alike is to create what I will call localized resources. But like every design decision, a feature in one situation becomes a flaw in another situation. The Android app resources system is something which the Android team deserves a high five for, at least in my opinion. In case you do not care, feel free to skip to the next section where we get into the practical stuff. How We Used to Style Android Apps Using XML ResourcesĪs usual, I like to share with you the motivations behind, and a bit of history on, these topics. I will not be stopping to explain that concept here, as I already have in this article. How to style Text Composables specificallyīefore proceeding, it is important that you understand what a composable is.
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