iotaledger / iota-rust-sdk / 22557985525
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feat(kotlin): add Android support to Kotlin bindings (#972)

* feat(kotlin): add Android support to Kotlin bindings

CI/Release:
- Add 4 Android ABI targets to kotlin_publish.yml (aarch64, armv7, x86_64, i686)
- Setup Android NDK (r26d) and cargo-ndk for cross-compilation
- Split build step for desktop vs Android targets

Makefile:
- Add kotlin-android target for local builds with cargo-ndk
- Exclude android-demo from kotlin-examples

Documentation:
- Add Android Support section to Kotlin README (ABI table, Gradle setup,
  native loading, jniLibs alternative, local build instructions)

Demo App (bindings/kotlin/examples/android-demo):
- Minimal Android app calling GraphQlClient.newDevnet().chainId()
- JNA AAR dependency with JAR exclusion to avoid duplicate classes
- ProGuard rules for JNA and iota_sdk
- Tested on ARM64 emulator - successfully fetches chain ID from devnet

Closes #496

* fix(kotlin): update copyright dates to 2026 and remove custom theme

Update all copyright headers from 2025 to 2026. Remove themes.xml
and use default Material theme to reduce noise.

* fix(kotlin): address review feedback for Android support

- Fix cargo-ndk flag from -p to -P in Makefile and CI workflow
- Add rustup target add instructions for Android targets
- Add ANDROID_HOME / local.properties setup to demo prerequisites
- Add full local build dependency instructions to demo README

* docs(kotlin): add architecture diagram to Android demo README

Add diagram showing both production (Maven Central) and local
development paths for Android native library loading.

* fix(kotlin): address round 3 review feedback

- Replace architecture diagram with compact horizontal version
- Add real example path for ANDROID_NDK_HOME in Kotlin README

* feat(ci): add nightly job for Android build verification

Add kotlin_android_nightly.yml that runs daily at 2am UTC:
- Builds native .so for all 4 Android targets via cargo-ndk
- Builds the Android demo APK via Gradle

Also pin setup... (continued)

21227 of 25246 relevant lines covered (84.08%)

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Jobs
ID Job ID Ran Files Coverage
1 nextest - 22557985525.1 90
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Source Files on build 22557985525