I’ve tried sever hours building on Windows. If you have not too much experience like me it’s more complicated.
Just switched to Ubuntu , sdk 20 and NDK r7c, eclipse and sequoyah…
Works like a charm!
Now i want retry on Windows but with NDK r7c (before was r8 and didn’t work).
Good luck!!
Hi Hugh, thanks for the report. I’m glad to see somebody else reproduced it.
I’m sure we’ll hear back from Jules when he gets some time to take a look at these changes in the latest SDK / NDK.
I downloaded the latest NDKv8 and it’s all just fine here on my Mac…
Strange that it can’t find that Ant java class (which I’d be afraid to remove, since all the google examples use it). Perhaps it’s a path problem, e.g. is your sdk.dir value set up correctly? You can check in the local.properties file to make sure. Perhaps it ends in a slash or contains funny characters?
No… I spoke too soon, it does seem to be broken.
Doing a grep of the new ant files, that SetupTask class seems to have disappeared, so I guess it’s ok to remove it! Thanks, I’ll get that sorted out right away…
Oddly, all my existing stuff built fine - but I was building from inside Eclipse with Sequoia. I was going to did deeper (generate a new project from scratch, etc.), but I was too slow getting to it… 
Thanks!
