here you have some sort of tutorials, explaining how to use Iink SDK in Android: https://developer.myscript.com/docs/interactive-ink/1.1/android/fundamentals/interactive-ink-runtime/
But from some point (from Rendering page actually) there are some confusing moments.
Would you kindly provide a link to Calculator project source files?
You have a reference project on GitHub, but it's too complex. Some simple implementation like Calculator would be a great example.
thank you for contacting us.
Currently, did you try running the Android "GetStarted" sample, setting the contentPart to Math:
contentPart = contentPackage.createPart("Math");
This is the most simple sample we can provide :-).
Let us know if this helps.