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Android example: document pre-requisites and fix code for rust 1.92.0 (#8122)

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* [x] I have followed the instructions in the PR template

```
+ echo 'All checks passed.'
All checks passed.
```

I had to update `.png`'s for tests to pass, but I guess it's specific to
my laptop.

---------

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
This commit is contained in:
Dmitry Skorobogaty
2026-04-27 13:52:58 +04:00
committed by GitHub
parent 8a0855bb02
commit fe8b1edfc6
2 changed files with 25 additions and 18 deletions
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41
examples/hello_android/README.md
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@@ -1,24 +1,31 @@
Hello world example for Android. # Hello world example for Android.
Use `cargo-apk` to build and run. Requires a patch to workaround [an upstream bug](https://github.com/rust-mobile/cargo-subcommand/issues/29). ## Desktop pre-requisites
One-time setup: Android application require you to have toolchains and Android SDK installed:
```sh 1. `rustup target add armv7-linux-androideabi aarch64-linux-android` - install targets for android
cargo install \ 2. Set environment variables (these variables are required each time for `cargo apk`):
--git https://github.com/parasyte/cargo-apk.git \ ```sh
--rev 282639508eeed7d73f2e1eaeea042da2716436d5 \ export ANDROID_HOME="$HOME/tools/android"
cargo-apk export ANDROID_NDK_ROOT="${ANDROID_HOME}/ndk/29.0.14206865"
``` export PATH="$PATH:${ANDROID_NDK_ROOT}:${ANDROID_HOME}/build-tools/${BUILDTOOLS_VERSION}:${ANDROID_HOME}/cmdline-tools/bin"
```
3. Install command line tools:
```sh
mkdir -p "${ANDROID_HOME}/cmdline-tools"
curl -sLo /tmp/clt.zip https://dl.google.com/android/repository/commandlinetools-linux-14742923_latest.zip
unzip -d "${ANDROID_HOME}" /tmp/clt.zip
```
4. Install SDK components: `sdkmanager --sdk_root="${ANDROID_HOME}" --install "build-tools;36.0.0" "ndk;29.0.14206865" "platforms;android-35"`
> You may need to change SDK versions
5. Install cargo-apk: `cargo install --git https://github.com/parasyte/cargo-apk.git --rev 282639508eeed7d73f2e1eaeea042da2716436d5 cargo-apk`
> There was a [bug](https://github.com/rust-mobile/cargo-subcommand/issues/29) in the upstream, so the above installs a patched version.
Build and run: ## Build & run
```sh Use `cargo-apk` to build and run:
# Run on android 1. On android: `cargo apk run -p hello_android --lib`
cargo apk run -p hello_android --lib 2. On desktop: `cargo run -p hello_android`
# Run on your desktop
cargo run -p hello_android
```
![](screenshot.png) ![](screenshot.png)

2
examples/hello_android/src/lib.rs
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@@ -3,7 +3,7 @@
use eframe::{CreationContext, egui}; use eframe::{CreationContext, egui};
#[cfg(target_os = "android")] #[cfg(target_os = "android")]
#[no_mangle] #[unsafe(no_mangle)]
fn android_main(app: winit::platform::android::activity::AndroidApp) { fn android_main(app: winit::platform::android::activity::AndroidApp) {
// Log to android output // Log to android output
android_logger::init_once( android_logger::init_once(