android

Today, I’ve released my another tiny project. It’s a very simple implementation of Event Bus with RxJava 2 under the hood. This library is compatible with Java 1.7 or higher. I didn’t use Java 1.8 or 1.9 because I wanted to make it compatible with Android apps. You can use it as follows: Bus bus = ReactiveBus.create(); Disposable observer = bus.receive().subscribe(new Consumer<Event>() { @Override public void accept(Event event) { // handle event here } }); Once, we created Event Bus object and our observer (or more precisely: disposable subscriber), we can start sending events:...

Yesterday, I gave a presentation about connectivity in the Android apps during the DroidCon Poland 2017 Conference in Kraków. Below, you can see slides from this presentation. View slides on SpeakerDeck There’s also tweet related to this presentation from DroidCon Kraków: Piotr Wittchen tells us about how we can we keep the track of network 🌎 or Internet connectivity changes in our app 📱🆘🙂 pic.twitter.com/7YGGzNJeb2 — droidcon Kraków (@droidconkr) December 2, 2017 I hope, you enjoyed it....

During Hack Your Career event at the Silesian University of Technology, I’ve prepared a presentation titled Reactive Programming - Efficient Server Applications with a colleague from work. Arek told about theory of Reactive Programming, shown basic concepts, data types and a few examples in the code. During my part of the presentation, I’ve wrote a very simple server and client in Java (9 on the server, 7 on the client) with Vert....

Recently, with the remote help of guys from Uber in California, I integrated NullAway and ErrorProne with the one of my open-source Android projects. What is NullAway? Basically, it’s a tool to help eliminate NullPointerExceptions (NPEs) in your Java code. It detects situations where NPE could occur at the compile time. Let’s have a look at the following code: static void log(Object x) { System.out.println(x.toString()); } static void foo() { log(null); } NullAway will find out that we’re passing null and we’ll get appropriate error message:...

I’m continuing Rxfication of the Android. Recently I released brand new library called ReactiveAirplaneMode. As you may guess, it allows listening Airplane mode on Android device with RxJava observables. A usual I’ve hidden all implementation details, BroadcastReceivers and rest of the Android related stuff behind RxJava abstraction layer, so API is really simple. Just take a look on that: ReactiveAirplaneMode.create() .observe(context) .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(isOn -> textView.setText(String.format("Airplane mode on: %s", isOn.toString()))); In the code above subscriber will be notified only when airplane mode changes....