go mobile setup

Preparing:
1.Install NDK
2.Install Android-Studio  &&  SDK (with env ANDROID_HOME)
3.Install Go / git

Step 1:
$go get golang.org/x/mobile/cmd/gomobile
$gomobile init -ndk ~/Android/Ndk

Native App:

1.Android

basic/main.go

package main

import (
 "log"

 "golang.org/x/mobile/app"
 "golang.org/x/mobile/event/lifecycle"
 "golang.org/x/mobile/event/paint"
)

func main() {
 app.Main(func(a app.App) {
  for e := range a.Events() {
   switch e := a.Filter(e).(type) {
   case lifecycle.Event:
    // ...
   case paint.Event:
    log.Print("Call OpenGL here.")
    a.Publish()
   }
  }
 })
}

$gomobile build -target=android  basic/
$adb install basic.apk
2.iOS:
$gomobile build -target=android  basic/

SDK App:

hello/hello.go

package hello

import "fmt"

func Greetings(name string) string {
 return fmt.Sprintf("Hello, %s!", name)
}

1.Android:

$ gomobile   bind   -target=android    hello/

2.iOS:

$gomobile   bind   -target=ios     hello/

Import AAR to Android Studio:

1.File>New>New Module

2.>Import from AAR

3.build.gradle  add line:

compile project(':hello')

4.Use module

import hello.Hello;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String str=Hello.greetings("Steven");
    }
}