This joint talk with Robert Zetzsche is all about Ktor and Kotlin Multiplatform. Ktor is a modern framework for developing asynchronous client (e.g. Android, iOS, desktop) and server applications with Kotlin. The talk also shows how the framework can be used in combination with Kotlin Multiplatform to make use of code sharing between multiple platforms. Slides

A talk together with Robert Zetzsche about Kotlin Multiplatform for Android, iOS and desktop. It explores the potential of the technology, its pros & cons and shows with examples different use cases. Furthermore, we discuss the future of Kotlin Multiplatform as cross-platform framework. Slides

Talk about the declarative UI framework Compose with Robert Zetzsche. It recalls Compose’s origins, demonstrates how to create cross-platform UIs and discusses pros & cons. Also, we showed the integration and interoperability with the different target platforms like Android, iOS, desktop and web. Furthermore, we discussed the roadmap and the future of this UI framework. Slides

A kick-off talk for the conference recaps and discussions about Google I/O, WWDC and KotlinConf 2023. Slides

Basics of Jetpack Compose and declarative UIs. The talk consists of a live demo and also shows the use of Compose beyond Android.

Declarative UIs are an aspiring topic on mobile platforms. For example “Jetpack Compose” for Android, SwitftUI for iOS or Flutter. However, this approach is also interesting for the desktop. In my talk, I’ll show how to build declarative UIs with “Compose for Desktop” from JetBrains.

An introduction talk into declarative UIs and Jetpack Compose with a longer live coding part, subsequent Q&A session and discussion.

To kick-start the discussion about the Android Dev Summit, I’ve done a short recap, which included the most important topics.

I’ve done a short summary talk as starter for a discussion about the Google I/O 2019.

In this talk, a co-worker and I explained the possibilities of Spring Boot 2 with Kotlin It consisted of an elaborate introduction into the Kotlin programming language.

This blog post shows how to migrate Gradle scripts from Groovy to the Gradle Kotlin DSL in 5 simple steps.

Together with Nico, the host of the podcast, I discussed the language features, usage scenarios and future of the Kotlin programming language.

English speaking talk about the Gradle Kotlin DSL to create build scripts with Kotlin instead of Groovy.

An introduction to the Gradle Kotlin DSL to write build scripts with Kotlin instead of Groovy. This talk was focused on build scripts typically used in Android apps.

Another talk together with a co-worker about the Spring Boot framework and Kotlin. With the help of a demo application we showed how great it’s to write Spring Boot services with Kotlin instead of Java.

A “Kotlin for Android Developers” talk with an introduction into the programming language and how to use it in Android. The talk consisted of a live demo and a longer Q&A part.

Introduction into Spring Boot 2 and Kotlin together with a co-worker. I’ve provided the Kotlin knowledge and explained language concepts. Also, I’ve explained how to use them to write concise and well-structured code.

In the podcast, we discussed why the Kotlin programming language is such a great fit for Android app development.

Another short introduction talk into the Kotlin programming language with an example Android app.

A talk about functions in Kotlin mainly consisting of a live demo with examples for higher order functions, extension functions and function literals with receiver to build a DSL with Kotlin.

Kotlin for Android developers talk in German that showed the potential of the programming language for Android. After a short introduction into the basic language features, the talk consisted of an interactive live demo and a longer Q&A part.

The talk was all about the architecture and structure of a modern Android app. It showcased examples from the waipu.tv Android app and the learnings we had while developing it.

In my masters thesis I’ve researched the possibilities of adaptive execution of code on client and server. As part of my thesis, I’ve developed two libraries in Dart and released them as open source software. This blog post describes the libraries and their usage scenarios.

My talk explained the basic concepts of Dart, the pros and cons, usage scenarios and the future of the programming language.

In this introduction talk, I’ve explained the options for developers when using the Google Play Game Services in their Android apps.

This workshop introduced into the Android app development in combination with Google App Engine. It consisted of an introduction into Android app development part and afterwards a practical task in which the participants developed an application.

An update article about Chromecast and Google Cast SDK. It explains the used technology and shows application scenarios for the platform.

When the Chromecast hardware was announced by Google in mid-2013, it received a lot of attention. This article gives an introduction into Chromecast, the Google Cast environment and the newly announced Cast SDK.

This article is about the streaming technology Miracast. It shows the usage scenarios, availability and potential of Miracast at the interaction with Android.

Stellar Presentation is a presentation application for the desktop developed with Compose for Desktop. The app has features like full-screen mode and keyboard controls. Also, it supports different presentations and provides slide templates for new presentations. I’m using Stellar Presentation as showcase and presentation app for my talks about Compose.

Puzzlers have a long history in learning and understanding technology. This repository contains an Android app with Jetpack Compose puzzlers that I’ve posted on Twitter. It also links to solutions/explanations for the puzzlers.

To get deeper into Compose for Desktop, I’ve created an extensive demo app that contains Compose and desktop specific APIs. The demo app is my playground and starting point to test some features of Compose. I’ve open sourced it to give fellow developers a concise collection of the features and as a starting point to see what’s possible with Compose for Desktop.

A wrapper for the “Android Debug Bridge” (adb) tool that’s provided by the Android SDK. The tool makes it easier to use adb on the command line and provides some useful helper functions that are missing in adb. It’s written in Python 3 and uses the “Click” cli framework.

The Kotlin/Native Command Line Interface Kit is a library that makes it possible to easily develop CLI applications with Kotlin/Native. It provides a simple yet useful Kotlin DSL to define the application and supports Kotlin Multiplatform.

An Android app with widgets that visualize sensor data like temperature or pressure. The data is fetched from the openSenseMap project and the user can select the desired station and the data to display.

This small project started with a question of a friend of mine: Can you track how often I turn my screen on every day? The On-Off Tracker App does exactly that, it measures how often the screen has been switched on and off.

Unciv is an open source CIV V remake. I’ve contributed several improvements, did refactorings and bug fixes. Also, I’m active in the community and discuss the future development steps of the game.

For me, open source is an essential part as a developer. As consumer and as active contributor. Therefore, I’ve contributed to several open source projects in the past. Mainly in the topics Android and Gradle Kotlin DSL.