https://developer.android.com/studio/index.html
- Android SDK Api level 24
- sdk tools 25.2.2
- sdk platform-tools 25
If the ndk-bundle is a different version than ndk r12b, download it separately Android NDK r12b https://developer.android.com/ndk/downloads/older_releases.html#ndk-12b-downloads
Clone this branch https://github.com/Cristo86/gvr-android-sdk/tree/common_prev_version into the workspace folder (folder that will contain hifi repo too, so if "hifi" is the checkouted folder, gvr-android-sdk might be a sister of it)
${ANDROID_NDK}/build/tools/make_standalone_toolchain.py --arch arm --api 24 --stl=gnustl --install-dir ${ANDROID_NDK}/toolchains/my-tc-24-gnu
https://www.dropbox.com/s/0ozqzfh9rh0mdzs/openssl.tar.gz?dl=0 (donwload and unpack it to the same workspace folder, being sister of hifi and gvr-android-sdk)
http://ant.apache.org/bindownload.cgi
Be sure to follow also the conventions about env. variables from the original build_android instructions and Scribe: https://github.com/highfidelity/hifi/blob/master/BUILD_ANDROID.md