Aug 3, 2022Kotlin Flow: Best PracticesSince few months, @Geev, we used Kotlin Flow inside our Android application. It is a really beautiful library to use, it helps us to write efficient streams of data. The following few points are what we believe to be our base of best practices. No Kotlin Flow 🙅♀️ This first point may be the…Kotlin Flow4 min readKotlin Flow4 min read
Jul 3, 2022Redundant DTO-Domain Mapping in Kotlin FlowSeparating layers is a best practice to write high-quality code, to prevent errors and to avoid unexpected behavior inside projects. When fetching data from an API, we often parse the result into DTO class. Using a Mapper, we transform it into Domain class. Then, in other layers, we only consume…Kotlin Flow6 min readKotlin Flow6 min read
Jun 3, 2022Kotlin Flow with Clean Architecture and MVVM Pattern in AndroidThe main goal when developing an Android application is to write a code easy to test and painless to maintain. We must use an architecture which makes it effortless. To do so, we should follow the Separation of Concerns. It helps us to have an efficient application design by separating…Kotlin Flow6 min readKotlin Flow6 min read
May 3, 2022Reduce verbosity in Kotlin FlowUsing Kotlin Flow in our Android app became a real improvement. Beside to be a Kotlin native library based on coroutine, it is easy to understand, to implement and to read. Reducing verbosity has great advantages: it lowers the noise when we read the code, it saves us time when…Kotlin5 min readKotlin5 min read
Published inLevel Up Coding·Apr 3, 2022Unit Test with Kotlin FlowWhen we develop a feature, we need to write unit tests for each section of the functionality. It is a huge and necessary part of the development. This guarantees the correct functioning of the code over future changing / refactoring. Kotlin Flow is no exception. In our Android app, we…Kotlin Flow6 min readKotlin Flow6 min read
Mar 3, 2022Handle exceptions in callbackFlow with KotlinIn our android app @Geev, we tried Kotlin Flow to handle Websockets calls for our new instant messaging. We mostly used callbackFlow builder to emit and receive data. This builder is easy to use and can be kept alive listening to sockets events. But we struggled to catch unexpected exceptions…Kotlin Flow5 min readKotlin Flow5 min read
Feb 3, 2022Websockets states with Kotlin StateFlowFollowing our journey with Kotlin Flow on Android @Geev, we tried to share the Websockets states all over the app. We wished to save user’s message in local when disconnection happened, to change icons on screen or to notify the user with an in-app message... …Kotlin5 min readKotlin5 min read
Published inProAndroidDev·Jan 3, 2022Kotlin Flow: The easy way to deal with local and remote data@Geev, we needed to redesign our current messaging feature. We thought to improve it as an instant messaging. We made a Proof of Concept: a simple instant messaging app using Websockets. …Kotlin5 min readKotlin5 min read
Jun 24, 2021Using Bluetooth Low Energy between Raspberry Pi and FlutterMonths ago, I built a printed lighthouse weather station. It used Classical Bluetooth to communicate between a Raspberry Pi in Python and a mobile application in Flutter. I migrated both to support Bluetooth Low Energy. The great thing about Flutter is to create apps for different platforms, as Android, iOS…Internet Of Things4 min readInternet Of Things4 min read
Dec 30, 2020How I built a lighthouse weather station?My dad is a Brittany lover. If he could, he would live in a lighthouse. For his birthday, I thought to giving him a connected lighthouse station. My idea was to built a device which could inform him about the weather with a color set. I also wanted my dad…IoT6 min readIoT6 min read
