Build Android App in Android Studio with Go(1.4.1) support.

Preparation

  1. Linux 64bits (Archlinux for me)
  2. NDK
  3. golang crosscompile
  4. golang mobile tools
  5. golang jni maker
  6. android studio

Install NDK

  • Download & Install NDK 
//for arch
yaourt android-ndk
  • Make toolchains for ndk
//set ndk root dir 
export NDK_ROOT=/opt/android-ndk
//build toolchains
cd $NDK_ROOT
./build/tools/make-standalone-toolchain.sh --platform=android-9 --install-dir=$NDK_ROOT --ndk-dir=$NDK_ROOT --toolchain=arm-linux-androideabi-4.9

Golang runtime bootstrap (for android)

//get golang crosscompile 
git clone https://github.com/davecheney/golang-crosscompile.git
//source build script
source crosscompile.bash
//set some variables
export GOARM=7
export CC_FOR_TARGET=$NDK_ROOT/bin/arm-linux-androideabi-gcc
//!bootstrap
go-crosscompile-build android/arm

Get mobile tools

go get golang.org/x/mobile

Get Jni-maker

git clone https://github.com/gaxxx/go_jni_maker

Final step

  • create a golang library in $GOPATH
mkdir $GOPATH/src/testgojni
cat << 'EOF' > $GOPATH/src/testgojni/test.go
package testgojni
func Test() int {
    return 1
}
EOF
  • create a gradle based android studio project 
//copy & set jni maker
cp <go_jni_maker>  <android_studio_project>/app/
//set CC & GOLIB in make.bash (if necc)
CC=/opt/android-ndk/bin/arm-linux-androideabli-gcc
GOLIB=testgojni
  • RUN make.bash
  • insert init snippet in MainActivity
protected void onCreate(Bundle savedInstanceState) {
    .....
    Go.init(getApplicationContext());
    Testgojni.Test();
}
  • Have fun