[IanDrake]

You can write android apps in c# or JavaScript too.

I'm not sure if you consider them "supported" but they both have pretty advanced tooling for the purpose.

[StevePerkins]

If you write a C# app with Xamarin and have problems, then it's Xamarin's support problem. If you write a JavaScript app with Qt (I assume?), then it's Qt's support problem.

Now, if you write an app with Kotlin, then it's Google's support problem. I can see how that would change the game for a lot of shops.

[AlphaSite]

I'm not sure I trust google to support anything properly, I'm glad it's Jetbrain's problem. Atleast their tooling isn't garbage.

[m_fayer]

It is much easier to squeeze support out of Xamarin than Google.

[pkolaczk]

Google support - you mean this 50cm thick concrete wall developers and users are banging their heads on when they want some bugs fixed? Like e.g. this: https://productforums.google.com/forum/#!topic/hangouts/A5Rp...

[dragandj]

What are you going to do if your Kotlin app has some problems? Call Google on the phone? Write and email and expect an answer?

[pkolaczk]

You can write a forum post. And then you'll get confirmations from another 100 developers, so you'll definitely feel a bit better and not alone in your pain. ;)

[on_and_off]

Not really.

You don't have direct access to Android's API with C#, you use a dedicated runtime wrapping your calls and allowing you to interact with the framework. This comes with a very large variety of issues.

With kotlin, you have 100% interop for free.

[kevingadd]

The C# tooling is good but it's partially closed-source and sold by a vendor (Xamarin). On that basis I don't think it really 'counts'. JS does, at least, since there are many ways to ship JS-based Android apps for free.

[Maarten88]

Xamarin got bought by Microsoft, and they opened almost everything from Xamarin, except Xamarin Studio which got rebranded as Visual Studio for Mac.