[2] Writing custom platform-specific code, https://docs.flutter.dev/platform-integration/platform-channels • [3] Pigeon, https://pub.dev/packages/pigeon • [4] jin, https://pub.dev/packages/jni • [5] jnigen/README.md, https://github.com/dart-lang/jnigen/blob/main/README.md • [6] jnigen, https://pub.dev/packages/jnigen • [7] ffi, https://pub.dev/packages/ffi • [8] ffigen, https://pub.dev/packages/ffigen • [9] pedometer, https://github.com/flutter/samples/tree/main/experimental/pedometer