Add a minimal OpenXR Info example

Author: rib

na-openxr-info/.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
+*.so
+
+# Added by cargo
+
+/target
+Cargo.lock

na-openxr-info/.idea/.gitignore

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+[package]
+name = "na-openxr-info"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+log = "0.4"
+openxr = { version = "0.16" }
+
+[target.'cfg(not(target_os = "android"))'.dependencies]
+env_logger = "0.9"
+
+[target.'cfg(target_os = "android")'.dependencies]
+android_logger = "0.11.0"
+android-activity = { path="../../android-activity", features = ["native-activity"] }
+
+[patch.crates-io]
+# openxr 0.16 uses ndk-glue, but master uses ndk-context which is compatible with android-activity
+openxr = { git = "https://github.com/Ralith/openxrs" }
+
+[features]
+default = [ "linked" ]
+
+android = [ "openxr/linked" ]
+desktop = [ "linked", "openxr/static"]
+linked = []
+
+[lib]
+name="main"
+crate_type=["cdylib"]
+
+[[bin]]
+path="src/lib.rs"
+name="test-winit-wgpu"
+required-features = [ "desktop" ]

na-openxr-info/.idea/compiler.xml

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+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](https://github.com/Ralith/openxrs/blob/master/openxr/examples/hello.rs)
+example from the [openxrs](https://github.com/Ralith/openxrs) repo.
+
+# Oculus Quest
+
+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/
+
+unpack the zip file and then set the OVR_OPENXR_LIBDIR environment variable
+to point at the directory with libopenxr_loader.so
+
+```
+export export OVR_OPENXR_LIBDIR="path/to/ovr_openxr_mobile_sdk_42.0/OpenXR/Libs/Android/arm64-v8a/Debug"
+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
+```
+
+# Desktop
+
+To build for PC you need to build with the "desktop" feature
+
+`cargo run --features=desktop`

na-openxr-info/.idea/gradle.xml

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+/build

na-openxr-info/.idea/misc.xml

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+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdk 31
+
+    defaultConfig {
+        applicationId "co.realfit.naopenxrinfo"
+        minSdk 24
+        targetSdk 25
+        compileSdkVersion 26
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+        debug {
+            minifyEnabled false
+            //packagingOptions {
+            //    doNotStrip '**/*.so'
+            //}
+            //debuggable true
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+
+
+}
+