rust_widgets 0.9.6

# Android Backend Integration Status (BLUE11 R2.5)

## Current Status

The Android backend exists as a JNI bridge (`src/platform/android_jni.rs`) with native method declarations for creating and managing Android native views. The backend is feature-gated behind `#[cfg(feature = "android-jni")]`.

| Component | Status | Notes |
|-----------|--------|-------|
| JNI bridge initialization | ✅ Implemented | `Java_rust_1widgets_RustWidgets_nativeInit` stores `JavaVM` global ref |
| Button creation | ✅ Implemented | `nativeCreateButton` — creates `android.widget.Button` |
| TextView creation | ✅ Implemented | `nativeCreateTextView` — creates `android.widget.TextView` |
| EditText creation | ✅ Implemented | `nativeCreateEditText` — creates `android.widget.EditText` |
| CheckBox creation | ✅ Implemented | `nativeCreateCheckBox` — creates `android.widget.CheckBox` |
| RadioButton creation | ✅ Implemented | `nativeCreateRadioButton` — creates `android.widget.RadioButton` |
| ProgressBar creation | ✅ Implemented | `nativeCreateProgressBar` — creates `android.widget.ProgressBar` |
| SeekBar creation | ✅ Implemented | `nativeCreateSeekBar` — creates `android.widget.SeekBar` |
| View text setting | ✅ Implemented | `nativeSetViewText` — calls `setText()` via JNI |
| View bounds setting | ✅ Implemented | `nativeSetViewBounds` — calls `setFrame()` or `layout()` via JNI |
| View visibility | ✅ Implemented | `nativeSetViewVisibility` — calls `setVisibility()` via JNI |
| View enabled state | ✅ Implemented | `nativeSetViewEnabled` — calls `setEnabled()` via JNI |
| View destruction | ✅ Implemented | `nativeDestroyView` — removes view from parent |
| Cross-compilation CI | ❌ Missing | No Android NDK target in CI pipeline |
| End-to-end testing | ❌ Missing | No Android instrumentation test project |
| JNI signature validation | ❌ Missing | No automated check matching Rust ↔ Kotlin signatures |
| **Integration ready check** | **✅ Added** | `android_integration_ready()` function available |

## `android_integration_ready()` Function

Added to `src/platform/android_jni.rs`. Returns a comprehensive status summary:

```rust
pub fn android_integration_ready() -> IntegrationStatus
```

Returns an `IntegrationStatus` struct with:
- `jni_initialized: bool` — whether `JAVA_VM` has been set via `nativeInit`
- `native_methods_count: u32` — number of registered JNI method implementations
- `ready: bool` — overall readiness (JNI initialized + methods registered)

## Blockers

1. **No Android NDK CI Build** — The `android-jni` feature requires `jni` crate and Android NDK toolchain. CI currently has no Android target or NDK step.
2. **No Automated JNI Signature Validation** — JNI method names/signatures must exactly match Java `native` declarations. Mismatches cause `UnsatisfiedLinkError`.
3. **No Real Device/Emulator Test Harness** — No Android instrumentation test project or Gradle/Android Studio project linking `librust_widgets.so`.

## Next Steps

1. Set up Android CI with NDK (android-ndk r26+) and target `aarch64-linux-android`.
2. Write an Android test app with `RustWidgets` Kotlin object and an `Activity`.
3. Add a `build.rs` or `xtask` that cross-compiles for Android.
4. Run `adb` instrumentation tests.