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Erik Hellman

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3D content with Compose Multiplatformdroidcon London 20252025-10-30
Combining Compose Multiplatform with real 3D engines proves trickier than it sounds because Compose/Skia uses 2D orthographic rendering while 3D engines…
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Keynote - The Future of Android...And How to Prepare For Itdroidcon Berlin 20252025-09-24
Panel predicts AI will generate much UI code while humans focus on architecture, observability and testing; recommend Compose Multiplatform for cross‑shipping…
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Wireless protocols for the next generation IoT devicesdroidcon London 20242024-10-31
Compares 2.4 GHz Wi‑Fi and Bluetooth: Wi‑Fi uses wide channels for higher throughput while Bluetooth does frequency hopping for robustness, hence lower speed…
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That's not a phone...droidcon Berlin 20242024-07-03
Survey of real, shipped Android hardware from tiny phones to cars, with hard numbers and failure causes: Xperia X10 mini forced Android to accept smaller…
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Working with custom Android devicesDroidcon London 20232023-10-26
Covers the exact kit and steps used to get custom Android hardware from lab to boot: order developer boards early (delivery can be three months), expect…
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State of Bluetooth LE on Android in 2023Android Makers by droidcon 20232023-04-27
Bluetooth LE on Android is usable but brittle: avoid supporting versions below Android 8 (API 26), rely on companion device manager plus a foreground service…
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Developing system apps without AOSPAndroid Makers by droidcon 20232023-04-27
Claim: system apps can be developed without full AOSP by reusing AOSP test keys and userdebug images and by calling protected APIs directly. Practical steps…
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App ClinicAndroid Makers by droidcon 20232023-04-27
A live app clinic reviews four fresh installs: OufMime (family mime game), Babbel, Color Pop (coloring), and SeLoger, with reviewers opening each app cold and…
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Building Android apps in 2022Øredev 20222022-11-08
Concrete takeaways: Kotlin becomes the default—suspend Retrofit calls replace RxJava so threading and disposables vanish and lifecycleScope auto-cancels on…
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State of BLE on Android in 2022droidcon London 20222022-10-27
Bluetooth Low Energy on Android works but has concrete caveats: target min SDK 26, use the companion device manager and companion device service for discovery…
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The technical solutions behind Öppna SkolplattformenJfokus 20222022-05-02
Group of volunteers reverse engineers Stockholm Skolplattform, ships an open‑source mobile client in six weeks, and reaches #1 on the App Store with a 12 SEK…
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Bluetooth LE for Modern Android Developmentdroidcon Berlin 20212021-10-20
Practical checklist for BLE on Android: target at least API level 28 (API 31 adds companion device service), use CompanionDeviceManager for pairing/background…
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Building Progressive Web Apps in KotlinKotlinConf 20192019-12-04
Claim: Kotlin compiles to usable Progressive Web Apps with actual examples of service worker registration, offline caching, network-first vs cache-first…
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Day 1KotlinConf 20192019-12-04
Group interviews record concrete progress: Kotlin multiplatform drops many project models into a reduced Gradle model, dependency management for MPP becomes…
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Android and the WebViewdroidCon Berlin 20192019-07-01
Recommends using Chrome Custom Tabs (AndroidX Browser) for remote HTTPS links, with service warm up to preload pages; enables setWebContentsDebuggingEnabled…
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Android and the WebViewdroidcon Italy 20192019-04-04
Recommendation: avoid loading arbitrary remote sites in a WebView and prefer Custom Chrome Tabs for external pages; use WebViewCompat (AndroidX) and…
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Machine Learning on mobile with MLKitØredev 20182018-11-19
Machine Learning is becoming more approachable for developers with no or very little background in Data Science. With the release of MLKit from Google…
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Mobile Augmented Reality with ARCoreØredev 20182018-11-19
ARCore is the framework from Google for building rich Augmented Reality applications for mobile. In this session, you will be introduced to the concepts of…
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Lightning talk from Erik HellmanNordic.js 20182018-10-06
A GitHub repo of WebRTC examples gets a targeted cleanup and a prototype that moves from bare global-script demos to contextualized samples that combine a…
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Better asynchronous programming with Kotlin CoroutinesAndroid Makers 20182018-04-23
Builds a tiny DSL with extension functions load/then that runs a background async block as a Deferred and resumes on the UI, wires a LifecycleObserver to…
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Better asynchronous programming with Kotlin CoroutinesDroidcon Italy 20182018-04-19
Kotlin Coroutines are shown as a practical replacement for callback hell by building a tiny DSL: an extension on LifecycleOwner that returns a Deferred from an…
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Working with Google AssistantDroidcon Italy 20172017-04-06
Demo shows a working integration with Actions on Google and API AI (Dialogflow), backed by Firebase Cloud Functions and Node.js, using a static JSON of…
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MULTI-THREADING, CONCURRENCY AND ASYNC ON ANDROIDdroidcon NYC 20162016-09-29
Covers concrete internals (zygote uses clone, Linux treats threads and processes as tasks) and practical gotchas: Thread.interrupt only sets a flag so long…
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