additional check to avoid exception (#2313)

FoggyFinder · web-flow · commit a426c16f92c0 · 2023-06-13T07:10:15.000+08:00
diff --git a/source/SkiaSharp.Views.Forms/SkiaSharp.Views.Forms.Android/SKTouchHandler.cs b/source/SkiaSharp.Views.Forms/SkiaSharp.Views.Forms.Android/SKTouchHandler.cs
@@ -22,7 +22,7 @@ public SKTouchHandler(Action<SKTouchEventArgs> onTouchAction, Func<double, doubl
 
 		public void SetEnabled(View view, bool enableTouchEvents)
 		{
-			if (view != null)
+			if (view != null && view.Handle != IntPtr.Zero)
 			{
 				view.Touch -= OnTouch;
 				if (enableTouchEvents)

Original file line number	Diff line number	Diff line change
`@@ -22,7 +22,7 @@ public SKTouchHandler(Action<SKTouchEventArgs> onTouchAction, Func<double, doubl`
`22`	`22`
`23`	`23`	`public void SetEnabled(View view, bool enableTouchEvents)`
`24`	`24`	`{`
`25`		`- if (view != null)`
	`25`	`+ if (view != null && view.Handle != IntPtr.Zero)`
`26`	`26`	`{`
`27`	`27`	`view.Touch -= OnTouch;`
`28`	`28`	`if (enableTouchEvents)`