android-activity/examples/na-subclass-jni/README.md

This is a minimal test application similar to na-mainloop that demonstrates running with a subclass of NativeActivity and overriding the onNewIntent Activity method and notifying rust whenever it's called.

Note: unlike the na-mainloop example, this one can't be built via cargo apk since it needs to compile some Java code.

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
adb shell am start -n co.realfit.nasubclassjni/.MainActivity