Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go version go1.9.2 windows/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

set GOARCH=amd64
set GOBIN=
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=C:\Users\Administrator\go
set GORACE=
set GOROOT=C:\Go
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set GCCGO=gccgo
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0
set CXX=g++
set CGO_ENABLED=1
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config

What did you do?

Want to write a simple Anroid VPN app with reverse binding. I did a quick test based on the reverse example.

So I make an attempt for try as

package reverse

import (
"Java/android/databinding/DataBindingUtil"
"Java/android/os"
"Java/android/net/VpnService"
gonet "Java/android/net"
gointent "Java/android/content/Intent"
"Java/android/support/v7/app"
gopkg "Java/reverse"
rlayout "Java/reverse/R/layout"
"Java/reverse/databinding"
"Java/reverse/databinding/ActivityMainBinding"
)

type MainActivity struct {
app.AppCompatActivity
binding databinding.ActivityMainBinding
}
func (a *MainActivity) OnCreate(this gopkg.MainActivity, b os.Bundle) {
this.Super().OnCreate(b)
db := DataBindingUtil.SetContentView(this, rlayout.Activity_main)
a.binding = ActivityMainBinding.Cast(db)
a.binding.SetAct(this)
VpnService.Prepare(this)
a.StartService(gointent.New(this, gonet.VpnService))
}

func (a *MainActivity) OnDestroy(this gopkg.MainActivity) {
a.binding = nil // break reference cycle
this.Super().OnDestroy()
}

func (a *MainActivity) GetLabel() string {
return "Hello from Go!"
}

main change is VpnService.Prepare(this) and a.StartService(gointent.New(this, gonet.VpnService)), which comes from ToyVPN:

startService(getServiceIntent().setAction(ToyVpnService.ACTION_DISCONNECT));

private Intent getServiceIntent() {
return new Intent(this, ToyVpnService.class);
}

What did you expect to see?

Compile OK

What did you see instead?

..\reverse\reverse.go:34:29: type net.VpnService is not an expression.
Change to a.StartService(gointent.New(this, gonet.VpnService.Class)) also doesn't help

For reverse binding, I mainly refer to #16876 @eliasnaur

Thanks