Developing and running D GUI app on Android

[aberba]

On Wednesday, 13 January 2021 at 02:02:16 UTC, H. S. Teoh wrote:
> On Sun, Jan 10, 2021 at 06:58:13PM +0000, aberba via 
> Digitalmars-d-learn wrote:
>> [...]
>
> First, you need a way to build an APK, and then transfer that 
> to your Android device for testing.  Building an APK *can* be 
> done manually (well, scripted), but I don't recommend it.  The 
> simplest way is probably to install Android Studio and the 
> Android SDK, and use Gradle to build your project.  Gradle 
> takes care of the finicky details of how to build an APK, and 
> the Android dev tools let you install to Android in debug mode 
> without having to find your own way of transferring APKs.
>
> [...]

So Adam's tool setup is pretty clear (talked to him). What 
remains is calling Java classes and interacting with the 
Android's API. I know a little bit of Java but not enough 
Android. Just the calling conversation part.

Do you have a sample of how that works?