Add support for onDettached onAttach UnityWidget

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2022.3.0-alpha1
+
+* Added support for global flutter unity controller that outlives the UnityWidget
+
 ## 2022.2.0
 
 * Enable AndroidView due to native view improvement in flutter 3.3.0

android/build.gradle

@@ -66,6 +66,9 @@ dependencies {
 
     compileOnly rootProject.findProject(":flutter_plugin_android_lifecycle")
 
+    implementation "io.reactivex.rxjava3:rxjava:3.1.4"
+    implementation 'io.reactivex.rxjava3:rxandroid:3.0.0'
+
     // FOR DEV ONLY
 //    implementation(name: 'flutter', ext:'jar')
 }

android/src/main/kotlin/com/xraph/plugin/flutter_unity_widget/DataStreamHandler.kt

@@ -0,0 +1,48 @@
+package com.xraph.plugin.flutter_unity_widget
+
+import io.flutter.plugin.common.EventChannel
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.subjects.PublishSubject
+import org.json.JSONObject
+
+class DataStreamEventNotifier {
+    companion object {
+        val notifier: PublishSubject<DataStreamEvent> = PublishSubject.create()
+    }
+}
+
+data class DataStreamEvent(val eventType: String, val data: Any) {
+    fun toMap(): Map<String, Any> {
+        return mapOf("eventType" to eventType, "data" to data)
+    }
+
+    fun toJsonString(): String {
+        return JSONObject(toMap()).toString()
+    }
+}
+
+enum class DataStreamEventTypes {
+    OnUnityViewCreated,
+    OnUnityPlayerReInitialize,
+    OnViewReattached,
+    OnUnityPlayerCreated,
+    OnUnityPlayerUnloaded,
+    OnUnityPlayerQuited,
+    OnUnitySceneLoaded,
+    OnUnityMessage,
+    OnViewAttached,
+    OnViewDetached,
+}
+
+class DataStreamHandler: EventChannel.StreamHandler {
+    override fun onListen(arguments: Any?, events: EventChannel.EventSink) {
+        DataStreamEventNotifier.notifier.subscribeOn(AndroidSchedulers.mainThread())
+            .observeOn(AndroidSchedulers.mainThread()).subscribe {
+                events.success(it.toMap())
+            }
+    }
+
+    override fun onCancel(arguments: Any?) {
+        DataStreamEventNotifier.notifier.unsubscribeOn(AndroidSchedulers.mainThread())
+    }
+}

android/src/main/kotlin/com/xraph/plugin/flutter_unity_widget/FlutterUnityWidgetBuilder.kt

@@ -9,14 +9,12 @@ class FlutterUnityWidgetBuilder : FlutterUnityWidgetOptionsSink {
     fun build(
             id: Int,
             context: Context?,
-            binaryMessenger: BinaryMessenger,
             lifecycle: LifecycleProvider
     ): FlutterUnityWidgetController {
         UnityPlayerUtils.options = options
         val controller = FlutterUnityWidgetController(
                 id,
                 context,
-                binaryMessenger,
                 lifecycle
         )
         controller.bootstrap()