cargo-apk 0.10 and its fork cargo-apk2 both failed to discover the
installed Android platform in this Gitea runner, despite ANDROID_HOME,
platforms;android-34, build-tools, and NDK all being present, readable,
and pointed at correctly. We never isolated whether the bug is in the
shared ndk-build crate's discovery logic or in the runner's env-var
propagation through cargo subcommand exec, so this commit stops fighting
either tool and assembles the APK from explicit toolchain steps instead:
cargo ndk -> per-ABI .so files
aapt2 compile/link -> manifest + resources -> base APK
zip -> bundle native libs into lib/<abi>/
zipalign -> 4-byte alignment
apksigner -> v2/v3 signing (debug keystore for CI, real for release)
The pipeline lives in scripts/build_android_apk.sh so it's reproducible
locally (same env vars, same commands). AndroidManifest.xml is now
checked in under solitaire_app/android/ and mirrors what cargo-apk would
have generated from [package.metadata.android] — keep them in sync if
either is changed. Local `cargo apk build` still works on developer
machines where cargo-apk is happy; CI just stops depending on it.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
funman300