This code is for previous version of TapDance Android app, which doesn't create VPN for the whole phone, but merely binds proxy to a certain port. It still could be used in this mode by configuring apps(e.g. Firefox) to use local proxy on said port, however usability is quite limited and we consider this app to be Proof of Concept.
There is a plan to develop a new version of app, that would actually proxy all traffic.
You'd need gomobile to compile GUI version:
go get golang.org/x/mobile/cmd/gomobile
gomobile init
cd ${GOPATH}/src/github.com/SergeyFrolov/gotapdance/gobind
gomobile bind -target=android
For convinience it is recommended to use Gobind gradle plugin, compatible with Android Studio.