orientation

android/src/main/jni/CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.10)
 project(ux_keyboard)
 
-add_library(ux_keyboard SHARED keyboard_bridge.c)
+add_library(ux_keyboard SHARED keyboard_bridge.c sensor_bridge.c)
 target_link_libraries(ux_keyboard log)
 
 # 16KB page size support (required for Android 15+)

android/src/main/jni/sensor_bridge.c

@@ -0,0 +1,18 @@
+#include <jni.h>
+#include <stdint.h>
+
+// Shared state — Kotlin writes, Dart reads via FFI.
+// Encoded as Surface rotation convention:
+//   0 = portraitUp, 1 = landscapeLeft, 2 = portraitDown, 3 = landscapeRight.
+static int32_t g_device_orientation = 0;
+
+// --- Dart FFI reads ---
+
+int32_t ux_device_orientation(void) { return g_device_orientation; }
+
+// --- Kotlin JNI writes ---
+
+JNIEXPORT void JNICALL
+Java_io_swipelab_ux_SensorBridge_nSetDeviceOrientation(JNIEnv *env, jclass cls, jint v) {
+    g_device_orientation = v;
+}

android/src/main/kotlin/io/swipelab/ux/KeyboardPlugin.kt

@@ -7,12 +7,11 @@ import android.view.ViewTreeObserver
 import android.view.WindowInsets
 import android.view.WindowInsetsAnimation
 import io.flutter.embedding.engine.plugins.FlutterPlugin
-import io.flutter.embedding.engine.plugins.activity.ActivityAware
 import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
 import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 
-class KeyboardPlugin : FlutterPlugin, MethodChannel.MethodCallHandler, ActivityAware {
+class KeyboardPlugin : NativePlugin, MethodChannel.MethodCallHandler {
     private var methodChannel: MethodChannel? = null
     private var activity: Activity? = null
     private var windowFocusListener: ViewTreeObserver.OnWindowFocusChangeListener? = null

android/src/main/kotlin/io/swipelab/ux/NativePlugin.kt

@@ -0,0 +1,13 @@
+package io.swipelab.ux
+
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+
+interface NativePlugin {
+    fun onAttachedToEngine(binding: FlutterPlugin.FlutterPluginBinding) {}
+    fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {}
+    fun onAttachedToActivity(binding: ActivityPluginBinding) {}
+    fun onDetachedFromActivity() {}
+    fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) = onAttachedToActivity(binding)
+    fun onDetachedFromActivityForConfigChanges() = onDetachedFromActivity()
+}

android/src/main/kotlin/io/swipelab/ux/SensorBridge.kt

@@ -0,0 +1,9 @@
+package io.swipelab.ux
+
+object SensorBridge {
+    init {
+        System.loadLibrary("ux_keyboard")
+    }
+
+    @JvmStatic external fun nSetDeviceOrientation(v: Int)
+}

android/src/main/kotlin/io/swipelab/ux/SensorPlugin.kt

@@ -0,0 +1,55 @@
+package io.swipelab.ux
+
+import android.app.Activity
+import android.view.OrientationEventListener
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+
+class SensorPlugin : NativePlugin {
+    private var listener: OrientationEventListener? = null
+    private var current: Int = 0
+
+    override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+        attach(binding.activity)
+    }
+
+    override fun onDetachedFromActivity() {
+        detach()
+    }
+
+    private fun attach(activity: Activity) {
+        detach()
+        val l = object : OrientationEventListener(activity) {
+            override fun onOrientationChanged(degrees: Int) {
+                if (degrees == ORIENTATION_UNKNOWN) return
+                val bucket = bucketFor(degrees, current)
+                if (bucket == current) return
+                current = bucket
+                SensorBridge.nSetDeviceOrientation(bucket)
+            }
+        }
+        if (l.canDetectOrientation()) l.enable()
+        listener = l
+    }
+
+    private fun detach() {
+        listener?.disable()
+        listener = null
+    }
+
+    companion object {
+        internal fun bucketFor(degrees: Int, previous: Int): Int {
+            val d = ((degrees % 360) + 360) % 360
+            return when {
+                d in 0..30 || d in 330..359 -> 0
+                d in 60..120                -> 3
+                d in 150..210               -> 2
+                d in 240..300               -> 1
+                d in 31..59                 -> if (previous == 0 || previous == 3) previous else 0
+                d in 121..149               -> if (previous == 3 || previous == 2) previous else 3
+                d in 211..239               -> if (previous == 2 || previous == 1) previous else 2
+                d in 301..329               -> if (previous == 1 || previous == 0) previous else 1
+                else                        -> previous
+            }
+        }
+    }
+}

android/src/main/kotlin/io/swipelab/ux/UxPlugin.kt

@@ -0,0 +1,30 @@
+package io.swipelab.ux
+
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.embedding.engine.plugins.activity.ActivityAware
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+
+class UxPlugin : FlutterPlugin, ActivityAware {
+    private val plugins: List<NativePlugin> = listOf(
+        KeyboardPlugin(),
+        SensorPlugin(),
+    )
+
+    override fun onAttachedToEngine(binding: FlutterPlugin.FlutterPluginBinding) =
+        plugins.forEach { it.onAttachedToEngine(binding) }
+
+    override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) =
+        plugins.forEach { it.onDetachedFromEngine(binding) }
+
+    override fun onAttachedToActivity(binding: ActivityPluginBinding) =
+        plugins.forEach { it.onAttachedToActivity(binding) }
+
+    override fun onDetachedFromActivity() =
+        plugins.forEach { it.onDetachedFromActivity() }
+
+    override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) =
+        plugins.forEach { it.onReattachedToActivityForConfigChanges(binding) }
+
+    override fun onDetachedFromActivityForConfigChanges() =
+        plugins.forEach { it.onDetachedFromActivityForConfigChanges() }
+}