From a64333e29ea6138bc9adf0346e724f155eae3bc9 Mon Sep 17 00:00:00 2001
From: Rui Marinho <me@ruimarinho.net>
Date: Wed, 12 Oct 2016 12:54:47 +0100
Subject: [Android] Fix possible NRE when detaching NavigationPageRenderer
 (#415)

---
 Xamarin.Forms.Platform.Android/Renderers/NavigationRenderer.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'Xamarin.Forms.Platform.Android')

diff --git a/Xamarin.Forms.Platform.Android/Renderers/NavigationRenderer.cs b/Xamarin.Forms.Platform.Android/Renderers/NavigationRenderer.cs
index 3fbfa096..c02dc42b 100644
--- a/Xamarin.Forms.Platform.Android/Renderers/NavigationRenderer.cs
+++ b/Xamarin.Forms.Platform.Android/Renderers/NavigationRenderer.cs
@@ -74,13 +74,13 @@ namespace Xamarin.Forms.Platform.Android
 		protected override void OnAttachedToWindow()
 		{
 			base.OnAttachedToWindow();
-			PageController.SendAppearing();
+			PageController?.SendAppearing();
 		}
 
 		protected override void OnDetachedFromWindow()
 		{
 			base.OnDetachedFromWindow();
-			PageController.SendDisappearing();
+			PageController?.SendDisappearing();
 		}
 
 		protected override void OnElementChanged(ElementChangedEventArgs<NavigationPage> e)
@@ -145,7 +145,7 @@ namespace Xamarin.Forms.Platform.Android
 		void InsertPageBefore(Page page, Page before)
 		{
 
-			int index = ((IPageController)Element).InternalChildren.IndexOf(before);
+			int index = PageController.InternalChildren.IndexOf(before);
 			if (index == -1)
 				throw new InvalidOperationException("This should never happen, please file a bug");
 
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