Fix new input system touches on android.

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

@@ -46,7 +46,19 @@ class CustomUnityPlayer(context: Activity, upl: IUnityPlayerLifecycleEvents?) :
  if (event == null) return false
 
  event.source = InputDevice.SOURCE_TOUCHSCREEN
- return super.onTouchEvent(event)
+
+ // true for Flutter Virtual Display, false for Hybrid composition.
+ if (event.deviceId == 0) { 
+ /* 
+ Flutter creates a touchscreen motion event with deviceId 0. (https://github.com/flutter/flutter/blob/34b454f42dd6f8721dfe43fc7de5d215705b5e52/packages/flutter/lib/src/services/platform_views.dart#L639)
+ Unity's new Input System package does not detect these touches, copy the motion event to change the immutable deviceId.
+ */
+ val modifiedEvent = event.copy(deviceId = -1)
+ event.recycle()
+ return super.onTouchEvent(modifiedEvent)
+ } else {
+ return super.onTouchEvent(event)
+ }
  }
 
 }

android/src/main/kotlin/com/xraph/plugin/flutter_unity_widget/utils/CopyMotionEvent.kt

@@ -0,0 +1,56 @@
+// source https://gist.github.com/sebschaef/b803da53217c88e8c691aeed08602193
+
+package com.xraph.plugin.flutter_unity_widget
+
+import android.view.MotionEvent
+
+/*
+ Copies a MotionEvent. Use the named parameters to modify immutable properties.
+ Don't forget to recycle the original event if it is not used anymore.
+*/
+fun MotionEvent.copy(
+ downTime: Long = getDownTime(),
+ eventTime: Long = getEventTime(),
+ action: Int = getAction(),
+ pointerCount: Int = getPointerCount(),
+ pointerProperties: Array<MotionEvent.PointerProperties>? =
+ (0 until getPointerCount())
+ .map { index ->
+ MotionEvent.PointerProperties().also { pointerProperties ->
+ getPointerProperties(index, pointerProperties)
+ }
+ }
+ .toTypedArray(),
+ pointerCoords: Array<MotionEvent.PointerCoords>? =
+ (0 until getPointerCount())
+ .map { index ->
+ MotionEvent.PointerCoords().also { pointerCoords ->
+ getPointerCoords(index, pointerCoords)
+ }
+ }
+ .toTypedArray(),
+ metaState: Int = getMetaState(),
+ buttonState: Int = getButtonState(),
+ xPrecision: Float = getXPrecision(),
+ yPrecision: Float = getYPrecision(),
+ deviceId: Int = getDeviceId(),
+ edgeFlags: Int = getEdgeFlags(),
+ source: Int = getSource(),
+ flags: Int = getFlags()
+): MotionEvent =
+ MotionEvent.obtain(
+ downTime,
+ eventTime,
+ action,
+ pointerCount,
+ pointerProperties,
+ pointerCoords,
+ metaState,
+ buttonState,
+ xPrecision,
+ yPrecision,
+ deviceId,
+ edgeFlags,
+ source,
+ flags
+ )