[Android] Allow path-based icons to be loaded as toolbar icons (#437)

* Created a bitmap method to check for resource as well as path

* Update platform and navigationrenderer to get images from two locations

* CellAdapter could use path-based icon finding

* sample app to test toolbaritem icons

4 files changed, 25 insertions, 6 deletions

diff --git a/Xamarin.Forms.Platform.Android/AppCompat/NavigationPageRenderer.cs b/Xamarin.Forms.Platform.Android/AppCompat/NavigationPageRenderer.cs
index b77063ee..dc3c5666 100644
--- a/Xamarin.Forms.Platform.Android/AppCompat/NavigationPageRenderer.cs
+++ b/Xamarin.Forms.Platform.Android/AppCompat/NavigationPageRenderer.cs
@@ -709,8 +709,8 @@ namespace Xamarin.Forms.Platform.Android.AppCompat
 					FileImageSource icon = item.Icon;
 					if (!string.IsNullOrEmpty(icon))
 					{
-						Drawable iconBitmap = context.Resources.GetDrawable(icon);
-						if (iconBitmap != null)
+						var iconBitmap = new BitmapDrawable(context.Resources, ResourceManager.GetBitmap(context.Resources, icon));
+						if (iconBitmap != null && iconBitmap.Bitmap != null)
 							menuItem.SetIcon(iconBitmap);
 					}
 					menuItem.SetEnabled(controller.IsEnabled);
diff --git a/Xamarin.Forms.Platform.Android/CellAdapter.cs b/Xamarin.Forms.Platform.Android/CellAdapter.cs
index 44bcb3d9..02bf7a38 100644
--- a/Xamarin.Forms.Platform.Android/CellAdapter.cs
+++ b/Xamarin.Forms.Platform.Android/CellAdapter.cs
@@ -8,6 +8,7 @@ using Android.Views;
 using Android.Widget;
 using AView = Android.Views.View;
 using AListView = Android.Widget.ListView;
+using Android.Graphics.Drawables;
 
 namespace Xamarin.Forms.Platform.Android
 {
@@ -194,7 +195,11 @@ namespace Xamarin.Forms.Platform.Android
 				IMenuItem item = menu.Add(Menu.None, i, Menu.None, action.Text);
 
 				if (action.Icon != null)
-					item.SetIcon(_context.Resources.GetDrawable(action.Icon));
+				{
+					var iconBitmap = new BitmapDrawable(_context.Resources, ResourceManager.GetBitmap(_context.Resources, action.Icon));
+					if (iconBitmap != null && iconBitmap.Bitmap != null)
+						item.SetIcon(_context.Resources.GetDrawable(action.Icon));
+				}
 
 				action.PropertyChanged += changed;
 				action.PropertyChanging += changing;
diff --git a/Xamarin.Forms.Platform.Android/Platform.cs b/Xamarin.Forms.Platform.Android/Platform.cs
index 3334ba6e..29af59f7 100644
--- a/Xamarin.Forms.Platform.Android/Platform.cs
+++ b/Xamarin.Forms.Platform.Android/Platform.cs
@@ -361,8 +361,8 @@ namespace Xamarin.Forms.Platform.Android
 					IMenuItem menuItem = menu.Add(item.Text);
 					if (!string.IsNullOrEmpty(item.Icon))
 					{
-						Drawable iconBitmap = _context.Resources.GetDrawable(item.Icon);
-						if (iconBitmap != null)
+						var iconBitmap = new BitmapDrawable(_context.Resources, ResourceManager.GetBitmap(_context.Resources, item.Icon));
+						if (iconBitmap != null && iconBitmap.Bitmap != null)
 							menuItem.SetIcon(iconBitmap);
 					}
 					menuItem.SetEnabled(controller.IsEnabled);
@@ -948,7 +948,10 @@ namespace Xamarin.Forms.Platform.Android
 				FileImageSource titleIcon = NavigationPage.GetTitleIcon(view);
 				if (!string.IsNullOrWhiteSpace(titleIcon))
 				{
-					actionBar.SetLogo(_context.Resources.GetDrawable(titleIcon));
+					var iconBitmap = new BitmapDrawable(_context.Resources, ResourceManager.GetBitmap(_context.Resources, titleIcon));
+					if (iconBitmap != null && iconBitmap.Bitmap != null)
+						actionBar.SetLogo(iconBitmap);
+
 					useLogo = true;
 					showHome = true;
 					showTitle = true;
diff --git a/Xamarin.Forms.Platform.Android/ResourceManager.cs b/Xamarin.Forms.Platform.Android/ResourceManager.cs
index b8629026..397b3c27 100644
--- a/Xamarin.Forms.Platform.Android/ResourceManager.cs
+++ b/Xamarin.Forms.Platform.Android/ResourceManager.cs
@@ -16,6 +16,17 @@ namespace Xamarin.Forms.Platform.Android
 
 		public static Type ResourceClass { get; set; }
 
+		public static Bitmap GetBitmap(this Resources resource, FileImageSource fileImageSource)
+		{
+			var file = fileImageSource.File;
+
+			var bitmap = GetBitmap(resource, file);
+			if (bitmap != null)
+				return bitmap;
+
+			return BitmapFactory.DecodeFile(file);
+		}
+
 		public static Bitmap GetBitmap(this Resources resource, string name)
 		{
 			return BitmapFactory.DecodeResource(resource, IdFromTitle(name, DrawableClass));