This is a minimal OpenXR application that builds for desktop or Android and simply prints out extension information for the OpenXR library.

This is based on the hello example from the openxrs repo.

To build for the Oculus Quest then you first need to download the Oculus OpenXR Mobile SDK from: https://developer.oculus.com/downloads/package/oculus-openxr-mobile-sdk/

and after unpacking the zip file you need to copy a suitable libopenxr_loader.so library to app/src/main/jniLibs/<abi>

For example if building for arm64-v8a:

mkdir app/src/main/jniLibs/arm64-v8a
cp ovr_openxr_mobile_sdk_53.0/OpenXR/Libs/Android/arm64-v8a/Debug/libopenxr_loader.so app/src/main/jniLibs/arm64-v8a/libopenxr_loader.so

export ANDROID_NDK_HOME="path/to/ndk"
export ANDROID_HOME="path/to/sdk"

rustup target add aarch64-linux-android
cargo install cargo-ndk

cargo ndk -t arm64-v8a -o app/src/main/jniLibs/ build --features=android
./gradlew build
./gradlew installDebug

To enable the Vulkan validation layer on the Oculus Quest run:

adb shell setprop debug.oculus.loadandinjectpackagedvvl.co.realfit.naopenxrwgpu 1

To build for PC you need to build with the "desktop" feature

cargo run --features=desktop