Drop unneeded cargo-apk setup and add xbuild docs

Without configuration `cargo-apk` uses the default `rust.<package>`
namespace, instead of the hardcoded `com.foo.bar`.  Similarly `xbuild`
can build and run this project out of the box, no extra configuration
(nor installation / dependencies!) required.

Author: MarijnS95

.github/workflows/ci.yml

@@ -23,6 +23,13 @@ jobs:
         with:
           rust-version: ${{ matrix.rust_version }}
 
+      - name: Build na-mainloop with xbuild
+        working-directory: na-mainloop
+        run: |
+          cargo install xbuild
+          # Showcase that x builds out-of-the-box with no external dependencies
+          x build --platform android --arch arm64
+
       - name: Install Rust targets
         run: >
           rustup target add

agdk-cpal/README.md

@@ -2,7 +2,7 @@ This is a minimal test application based on `GameActivity` that just
 runs a mainloop based on android_activity::poll_events() and plays a
 sine wave audio test using the Cpal audio library.
 
-```
+```bash
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_HOME="path/to/sdk"
 

agdk-eframe/README.md

@@ -3,7 +3,7 @@ This tests using `GameActivity` with egui, winit and wgpu.
 This is based on a re-worked winit backend here:
 https://github.com/rib/winit/tree/android-activity
 
-```
+```bash
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_HOME="path/to/sdk"
 

agdk-mainloop/README.md

@@ -3,7 +3,7 @@ runs a mainloop based on android_activity::poll_events() and traces
 the events received without doing any rendering. It also saves and
 restores some minimal application state.
 
-```
+```bash
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_HOME="path/to/sdk"
 

agdk-oboe/README.md

@@ -2,7 +2,7 @@ This is a minimal test application based on `GameActivity` that just
 runs a mainloop based on android_activity::poll_events() and plays a
 sine wave audio test using the Oboe audio library.
 
-```
+```bash
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_HOME="path/to/sdk"
 

na-mainloop/Cargo.toml

@@ -8,178 +8,11 @@ edition = "2021"
 [dependencies]
 log = "0.4"
 android_logger = "0.11.0"
-android-activity = { version = "0.4", features = [ "native-activity" ] }
+android-activity = { version = "0.4", features = ["native-activity"] }
 #android-activity = { path = "../../android-activity/android-activity", features = [ "native-activity" ] }
 ndk-sys = "0.4"
 ndk = "0.7"
 
 [lib]
 #name="na_mainloop"
-crate_type=["cdylib"]
-
-
-####################
-# cargo apk config #
-####################
-
-[package.metadata.android]
-# Specifies the package property of the manifest.
-package = "com.foo.bar"
-
-# Specifies the array of targets to build for.
-build_targets = [ "aarch64-linux-android" ]
-
-# Path to your application's resources folder.
-# If not specified, resources will not be included in the APK.
-#resources = "path/to/resources_folder"
-
-# Path to the folder containing your application's assets.
-# If not specified, assets will not be included in the APK.
-#assets = "path/to/assets_folder"
-
-# Name for final APK file.
-# Defaults to package name.
-#apk_name = "myapp"
-
-# Folder containing extra shared libraries intended to be dynamically loaded at runtime.
-# Files matching `libs_folder/${android_abi}/*.so` are added to the apk
-# according to the specified build_targets.
-#runtime_libs = "path/to/libs_folder"
-
-# See https://developer.android.com/guide/topics/manifest/uses-sdk-element
-#
-# Defaults to a `min_sdk_version` of 23 and `target_sdk_version` of 30 (or lower if the detected NDK doesn't support this).
-[package.metadata.android.sdk]
-min_sdk_version = 28
-target_sdk_version = 31
-#max_sdk_version = 31
-
-# See https://developer.android.com/guide/topics/manifest/uses-feature-element
-#
-# Note: there can be multiple .uses_feature entries.
-[[package.metadata.android.uses_feature]]
-name = "android.hardware.vulkan.level"
-required = true
-version = 1
-
-# See https://developer.android.com/guide/topics/manifest/uses-permission-element
-#
-# Note: there can be multiple .uses_permission entries.
-#[[package.metadata.android.uses_permission]]
-#name = "android.permission.WRITE_EXTERNAL_STORAGE"
-#max_sdk_version = 18
-
-# See https://developer.android.com/guide/topics/manifest/queries-element#provider
-#[[package.metadata.android.queries.provider]]
-#authorities = "org.khronos.openxr.runtime_broker;org.khronos.openxr.system_runtime_broker"
-# Note: The `name` attribute is normally not required for a queries provider, but is non-optional
-# as a workaround for aapt throwing errors about missing `android:name` attribute.
-# This will be made optional if/when cargo-apk migrates to aapt2.
-#name = "org.khronos.openxr"
-
-# See https://developer.android.com/guide/topics/manifest/queries-element#intent
-#[[package.metadata.android.queries.intent]]
-#actions = ["android.intent.action.SEND"]
-
-# See https://developer.android.com/guide/topics/manifest/queries-element#intent
-# Note: there can be several .data entries.
-#[[package.metadata.android.queries.intent.data]]
-#mime_type = "image/jpeg"
-
-# See https://developer.android.com/guide/topics/manifest/queries-element#package
-#[[package.metadata.android.queries.package]]
-#name = "org.freedesktop.monado.openxr_runtime.in_process"
-
-# See https://developer.android.com/guide/topics/manifest/application-element
-#[package.metadata.android.application]
-
-# See https://developer.android.com/guide/topics/manifest/application-element#debug
-#
-# Defaults to false.
-#debuggable = false
-
-# See https://developer.android.com/guide/topics/manifest/application-element#theme
-#
-# Example shows setting the theme of an application to fullscreen.
-#theme = "@android:style/Theme.DeviceDefault.NoActionBar.Fullscreen"
-
-# Virtual path your application's icon for any mipmap level.
-# If not specified, an icon will not be included in the APK.
-#icon = "@mipmap/ic_launcher"
-
-# See https://developer.android.com/guide/topics/manifest/application-element#label
-#
-# Defaults to the compiled artifact's name.
-label = "Application Name"
-
-# See https://developer.android.com/guide/topics/manifest/meta-data-element
-#
-# Note: there can be several .meta_data entries.
-# Note: the `resource` attribute is currently not supported.
-#[[package.metadata.android.application.meta_data]]
-#name = "com.samsung.android.vr.application.mode"
-#value = "vr_only"
-
-# See https://developer.android.com/guide/topics/manifest/activity-element
-[package.metadata.android.application.activity]
-
-# See https://developer.android.com/guide/topics/manifest/activity-element#nm
-#
-# The name of the class that implements the activity, a subclass of Activity
-#
-# Defaults to "android.app.NativeActivity"
-# name = "android.app.MyActivity"
-
-# See https://developer.android.com/guide/topics/manifest/activity-element#config
-#
-# Defaults to "orientation|keyboardHidden|screenSize".
-#config_changes = "orientation"
-
-# See https://developer.android.com/guide/topics/manifest/activity-element#label
-#
-# Defaults to the application's label.
-#label = "Activity Name"
-
-# See https://developer.android.com/guide/topics/manifest/activity-element#lmode
-#
-# Defaults to "standard".
-#launch_mode = "singleTop"
-
-# See https://developer.android.com/guide/topics/manifest/activity-element#screen
-#
-# Defaults to "unspecified".
-#orientation = "landscape"
-
-# See https://developer.android.com/guide/topics/manifest/activity-element#exported
-#
-# Unset by default, or "true" when targeting Android >= 31 (S and up).
-#exported = "true"
-
-# See https://developer.android.com/guide/topics/manifest/meta-data-element
-#
-# Note: there can be several .meta_data entries.
-# Note: the `resource` attribute is currently not supported.
-#[[package.metadata.android.application.activity.meta_data]]
-#name = "com.oculus.vr.focusaware"
-#value = "true"
-
-# See https://developer.android.com/guide/topics/manifest/intent-filter-element
-#
-# Note: there can be several .intent_filter entries.
-#[[package.metadata.android.application.activity.intent_filter]]
-# See https://developer.android.com/guide/topics/manifest/action-element
-#actions = ["android.intent.action.VIEW", "android.intent.action.WEB_SEARCH"]
-# See https://developer.android.com/guide/topics/manifest/category-element
-#categories = ["android.intent.category.DEFAULT", "android.intent.category.BROWSABLE"]
-
-# See https://developer.android.com/guide/topics/manifest/data-element
-#
-# Note: there can be several .data entries.
-# Note: not specifying an attribute excludes it from the final data specification.
-#[[package.metadata.android.application.activity.intent_filter.data]]
-#scheme = "https"
-#host = "github.com"
-#port = "8080"
-#path = "/rust-windowing/android-ndk-rs/tree/master/cargo-apk"
-#path_prefix = "/rust-windowing/"
-#mime_type = "image/jpeg"
+crate_type = ["cdylib"]

na-mainloop/README.md

@@ -4,10 +4,26 @@ the events received without doing any rendering. It also saves and
 restores some minimal application state.
 
 Since this test doesn't require a custom `Activity` subclass it's
-optionally possible to build this example with `cargo apk`.
+optionally possible to build this example with `xbuild` or `cargo apk`.
 
-# Gradle Build
+# xbuild
+
+```bash
+cargo install xbuild
+
+# Get ID of connected debug device, of the form adb:DEVICEID
+x devices
+
+# Build and run for that configuration
+x run --device adb:DEVICEID
+
+# Or build for a generic arm64 Android device
+x build --platform android --arch arm64
 ```
+
+# Gradle Build
+
+```bash
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_HOME="path/to/sdk"
 
@@ -20,7 +36,8 @@ cargo ndk -t arm64-v8a -o app/src/main/jniLibs/  build
 ```
 
 # Cargo APK Build
-```
+
+```bash
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_SDK_HOME="path/to/sdk"
 

na-openxr-info/Cargo.toml

@@ -17,17 +17,17 @@ android_logger = "0.11.0"
 android-activity = { version = "0.4", features = ["native-activity"] }
 
 [features]
-default = [ "linked" ]
+default = ["linked"]
 
-android = [ "openxr/linked" ]
-desktop = [ "linked", "openxr/static"]
-linked = []
+android = ["linked"]
+desktop = ["linked", "openxr/static"]
+linked = ["openxr/linked"]
 
 [lib]
-name="main"
-crate_type=["cdylib"]
+name = "main"
+crate_type = ["cdylib"]
 
 [[bin]]
-path="src/lib.rs"
-name="test-winit-wgpu"
-required-features = [ "desktop" ]
+path = "src/lib.rs"
+name = "test-winit-wgpu"
+required-features = ["desktop"]

na-openxr-info/src/lib.rs

@@ -1,4 +1,4 @@
-///! Based on https://github.com/Ralith/openxrs/blob/master/openxr/examples/hello.rs
+//! Based on <https://github.com/Ralith/openxrs/blob/master/openxr/examples/hello.rs>
 use openxr as xr;
 
 #[cfg(target_os = "android")]

na-openxr-wgpu/README.md

@@ -21,7 +21,7 @@ library to `app/src/main/jniLibs/<abi>`
 For example if building for arm64-v8a:
 `cp path/to/ovr_openxr_mobile_sdk_42.0/OpenXR/Libs/Android/arm64-v8a/Debug/libopenxr_loader.so app/src/main/jniLibs/arm64-v8a`
 
-```
+```bash
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_HOME="path/to/sdk"
 
@@ -36,12 +36,13 @@ cargo ndk -t arm64-v8a -o app/src/main/jniLibs/ build
 # Oculus Quest: Vulkan Validation Layer
 
 To enable the Vulkan validation layer on the Oculus Quest run:
-```
+
+```bash
 adb shell setprop debug.oculus.loadandinjectpackagedvvl.co.realfit.naopenxrwgpu 1
 ```
 
 # Desktop
 
 To build for PC you need to build with the "desktop" feature
 
-`cargo run --features=desktop`
+`cargo run --features=desktop`