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Android Crypto Java Kotlin

Java EC crypto with BouncyCastle

Java crypto is like an architect building a house. Architect only knows how to design a house, but needs a construction company to actually build it. In Java, only crypto interface is defined, and a provider is required to actually implement the methods. There are different providers, but one has stood out in the test […]

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Android Apps Architecture iOS Multiplatform Mobile

Kotlin Multiplatform logging libraries

When developing with any platform, the existence of libraries is assumed. This is to delegate common tasks to out project code, in order to reduce development time and avoid common pitfalls already solved by other developers. Kotlin Multiplatform(KMM) is no different. Available libraries Since Kotlin is becoming more popular among Android/JVM developers, one might expect […]

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Android Architecture Kotlin testing

Logging in a Java library

It can be useful to emit logs in a library. When doing so, one needs to consider when to emit, how to filter and who is responsible for printing/handling the logs. Correct logging should also be tested. When to log There are different reasons to emit a message, for instance on important events, undefined behaviour […]

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Android Automotive

Car data points in Android Automotive

When following the Android Automotive overview, it might seem that not much of the car info is available for developers. It is even stated that only media apps are allowed and there is no documentation about car properties. Looking further into the car emulator and Android source code, it looks like more is on the […]

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Android Apps Architecture testing

Part 2: Testing with MockK and Koin

One of the best things about MVVM is the use of separation of concerns principle which by design enables testing of each component in isolation. View, ViewModel and Model are all separated and thus easily testable. When thinking of testing, then unit testing comes to mind first and for that mocking of dependencies is required. […]

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Android Apps Architecture

Android App Architecture, Part 1

Not being familiar with modern Android App architecture and coming from the ViewController world, it is confusing jumping into the recommended MVVM architecture. There are also some parts of the official guide that are left for the reader to figure out, so I will write about my experience with implementing it in my repo browser […]

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Android Architecture NDK

Sharing native code between Android and Java projects

In High-Mobility, we have separate libraries for Android and Linux. For each of these we use native code that handles transport protocol. After implementing JNI for both of the platforms, we realized it would make sense to use a shared JNI module instead. Android setup At first we started developing for Android, and went for […]