This is a minimal test application based on NativeActivity that just 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.

Since this test doesn't require a custom Activity subclass it's optionally possible to build this example with cargo apk.

Gradle Build

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
./gradlew build
./gradlew installDebug

Run with:

adb shell am start -n com.github.realfit_mobile.namainloop/android.app.NativeActivity

Cargo APK Build

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

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

cargo apk build
cargo apk run