Published in Marshmallow Stories·May 26, 2021Our Android 1.0 journeyMarshmallow’s Android 1.0 app is live! 🚀 I’m Daniele, an Android engineer at Marshmallow, and I’d like to share our journey creating the first Marshmallow Android application in three months. All from scratch. Here at Marshmallow, we want to make insurance as easy as possible for our customers. Whether they need to update their policy, to get…Android App Development7 min readAndroid App Development7 min read
Sep 10, 2019How I made my legacy app modular — part 2This is part two of https://medium.com/@dbottillo/how-i-have-modularized-my-legacy-app-part-1-bb27282564dd . In part 1, I’ve shown how to move from one big module to three: The idea behind these three modules is that we can start move our codebase in three directions: everything that it’s shared across module should be moved to core (eg…Android4 min readAndroid4 min read
Jun 4, 2019Patterns in Kotlin: Abstract FactoryThe Abstract Factory Pattern intent is to provide an interface to create families of related or dependent objects without specify their concrete classes. For examples: let’s imagine that you have to integrate with a chat SDK in your application. Maybe in your company, you have decided to use a specific…Kotlin4 min readKotlin4 min read
Apr 15, 2019Animate Android custom viewThis is part 2 of https://medium.com/@dbottillo/creating-android-custom-view-6d8d46122cf5 In part 1, I’ve shown how to create a custom view to display a circle made of up to five arcs with different colours. In this post I’m showing how to animate the circle showing one arc after arc, to achieve the following: …Android2 min readAndroid2 min read
Apr 1, 2019Creating Android custom viewOne of my favourite part of writing an Android custom view is when you add value to the UI & UX of an application. Recently, as part of the development of an open source Android (and iOS) application of mine I’ve developed the following indicator: For some context, MTG Cards…Android App Development6 min readAndroid App Development6 min read
Mar 5, 2019How to write a custom rule in LintAt my team at Deliveroo, we have recently decided to start using Google Truth instead of Hamcrest for test assertion but considering the number of unit tests in the codebase, migrating all the tests to Truth it’s almost impossible. We’ve decided instead to have both libraries in the project and…Android6 min readAndroid6 min read
Jan 21, 2019How I made my legacy app modular — part 1We all have been there. Whatever is the team getting bigger or your app becoming old, there is a point at which to scale up the development of your Android application you start to consider how to modularize the codebase. When you reach that point things start to become messy…Android5 min readAndroid5 min read
Oct 12, 2018Kotlin sealed classes: how to test them with TruthIn my team at Deliveroo we’ve recently introduced Truth library for unit testing and we are very pleased with it: we like the syntax, the readability and the extendability. For example when dealing with sealed classes, unit test are not really the best; let’s assume to have a very simple…Kotlin2 min readKotlin2 min read
Mar 12, 2018Kotlin and static, not as easy as JavaIf you write Android code, it is very likely that you have some static field to use as key of your Shared Preferences or Bundles and usually in Java they are defined statically: public class MyAwesomeActivity { public static final String KEY = "MyAwesomeKey"; } If you try to convert…Android3 min readAndroid3 min read
Dec 29, 2017RxJava, a story about delay and schedulersRxJava is a beast. It has a very high learning curve but it lets you do complicated things in very few lines of code which comes with a price: you need to understand how the internal works otherwise it will bite you very hard! Recently I found a very strange…Android2 min readAndroid2 min read
