x/mobile: No Android NDK found when execute gomobile bind

[diov]

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

$ go version
go version go1.12.5 darwin/amd64

Does this issue reproduce with the latest release?

YES

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

go env Output

$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/dio/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/dio/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/Cellar/go/1.12.5/libexec"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.12.5/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/7j/fndqkfrx03l2gfplx1n4g1nm0000gp/T/go-build033656519=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

$ go get golang.org/x/mobile/cmd/gomobile
$ gomobile init
$ go get golang.org/x/mobile/example/bind/hello
$ gomobile bind -o app/hello.aar -target=android golang.org/x/mobile/example/bind/hello

What did you expect to see?

hello.aar was generated

What did you see instead?

$ gomobile bind -o app/hello.aar -target=android golang.org/x/mobile/example/bind/hello
gomobile: no Android NDK found in $ANDROID_HOME/ndk-bundle nor in $ANDROID_NDK_HOME

[diov]

I checked some other stuff.

$ gomobile version
gomobile version +6fa95d9 Fri Jun 7 21:45:18 2019 +0000 (android,ios); androidSDK=

$ echo $ANDROID_HOME
/Users/dio/AndroidSDK/sdk

$ echo $ANDROID_NDK_HOME
/Users/dio/AndroidSDK/android-ndk-r19c

Also, I've run go get -u golang.org/x/mobile/cmd/... before gomobile init, and here is the output

$ go get -u -v golang.org/x/mobile/cmd/...
Fetching https://golang.org/x/mobile/cmd/gobind?go-get=1
Parsing meta tags from https://golang.org/x/mobile/cmd/gobind?go-get=1 (status code 200)
get "golang.org/x/mobile/cmd/gobind": found meta tag get.metaImport{Prefix:"golang.org/x/mobile", VCS:"git", RepoRoot:"https://go.googlesource.com/mobile"} at https://golang.org/x/mobile/cmd/gobind?go-get=1
get "golang.org/x/mobile/cmd/gobind": verifying non-authoritative meta tag
Fetching https://golang.org/x/mobile?go-get=1
Parsing meta tags from https://golang.org/x/mobile?go-get=1 (status code 200)
golang.org/x/mobile (download)
Fetching https://golang.org/x/mobile/bind?go-get=1
Parsing meta tags from https://golang.org/x/mobile/bind?go-get=1 (status code 200)
get "golang.org/x/mobile/bind": found meta tag get.metaImport{Prefix:"golang.org/x/mobile", VCS:"git", RepoRoot:"https://go.googlesource.com/mobile"} at https://golang.org/x/mobile/bind?go-get=1
get "golang.org/x/mobile/bind": verifying non-authoritative meta tag
Fetching https://golang.org/x/mobile/internal/importers?go-get=1
Parsing meta tags from https://golang.org/x/mobile/internal/importers?go-get=1 (status code 200)
get "golang.org/x/mobile/internal/importers": found meta tag get.metaImport{Prefix:"golang.org/x/mobile", VCS:"git", RepoRoot:"https://go.googlesource.com/mobile"} at https://golang.org/x/mobile/internal/importers?go-get=1
get "golang.org/x/mobile/internal/importers": verifying non-authoritative meta tag
Fetching https://golang.org/x/mobile/internal/importers/java?go-get=1
Parsing meta tags from https://golang.org/x/mobile/internal/importers/java?go-get=1 (status code 200)
get "golang.org/x/mobile/internal/importers/java": found meta tag get.metaImport{Prefix:"golang.org/x/mobile", VCS:"git", RepoRoot:"https://go.googlesource.com/mobile"} at https://golang.org/x/mobile/internal/importers/java?go-get=1
get "golang.org/x/mobile/internal/importers/java": verifying non-authoritative meta tag
Fetching https://golang.org/x/mobile/internal/importers/objc?go-get=1
Parsing meta tags from https://golang.org/x/mobile/internal/importers/objc?go-get=1 (status code 200)
get "golang.org/x/mobile/internal/importers/objc": found meta tag get.metaImport{Prefix:"golang.org/x/mobile", VCS:"git", RepoRoot:"https://go.googlesource.com/mobile"} at https://golang.org/x/mobile/internal/importers/objc?go-get=1
get "golang.org/x/mobile/internal/importers/objc": verifying non-authoritative meta tag
Fetching https://golang.org/x/mobile/cmd/gomobile?go-get=1
Parsing meta tags from https://golang.org/x/mobile/cmd/gomobile?go-get=1 (status code 200)
get "golang.org/x/mobile/cmd/gomobile": found meta tag get.metaImport{Prefix:"golang.org/x/mobile", VCS:"git", RepoRoot:"https://go.googlesource.com/mobile"} at https://golang.org/x/mobile/cmd/gomobile?go-get=1
get "golang.org/x/mobile/cmd/gomobile": verifying non-authoritative meta tag
Fetching https://golang.org/x/mobile/internal/binres?go-get=1
Parsing meta tags from https://golang.org/x/mobile/internal/binres?go-get=1 (status code 200)
get "golang.org/x/mobile/internal/binres": found meta tag get.metaImport{Prefix:"golang.org/x/mobile", VCS:"git", RepoRoot:"https://go.googlesource.com/mobile"} at https://golang.org/x/mobile/internal/binres?go-get=1
get "golang.org/x/mobile/internal/binres": verifying non-authoritative meta tag

Still not work.

[diov]

It seems like Gomobile didn't detect android SDK, 'cause the output is "androidSDK=" when run gomobile version.
After re-download SDK platform package, it works correctly. So I will close this issue.

[huangweitong]

Hello, I hava the same problem now, could you tell me how you solved it? Thank you!