Implemented colored refresh indicator for ListView pull-to-refresh

Xamarin.Forms.Controls/CoreGalleryPages/ListViewCoreGalleryPage.cs

@@ -5,7 +5,7 @@
 using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Threading;
-
+using System.Threading.Tasks;
 using Xamarin.Forms.CustomAttributes;
 using Xamarin.Forms.Internals;
 
@@ -268,6 +268,16 @@ protected override void Build(StackLayout stackLayout)
 			fastScrollItemContainer.View.On<Android>().SetIsFastScrollEnabled(true);
 			fastScrollItemContainer.View.ItemsSource = viewModel.CategorizedEmployees;
 
+			var coloredSpinnerContainer = new ViewContainer<ListView>(Test.ListView.ColoredSpinner, new ListView());
+			InitializeElement(coloredSpinnerContainer.View);
+			coloredSpinnerContainer.View.SpinnerColor = Color.Yellow;
+			coloredSpinnerContainer.View.IsPullToRefreshEnabled = true;
+			coloredSpinnerContainer.View.Refreshing += async (object sender, EventArgs e) => {
+				await Task.Delay(2000);
+				coloredSpinnerContainer.View.IsRefreshing = false;
+			};
+			coloredSpinnerContainer.View.ItemsSource = viewModel.Employees;
+
 			Add(groupDisplayBindingContainer);
 			Add(groupHeaderTemplateContainer);
 			Add(groupShortNameContainer);
@@ -280,6 +290,7 @@ protected override void Build(StackLayout stackLayout)
 			Add(rowHeightContainer);
 			Add(selectedItemContainer);
 			Add(fastScrollItemContainer);
+			Add(coloredSpinnerContainer);
 		}
 	}
 }

Xamarin.Forms.Core/ListView.cs

@@ -46,6 +46,8 @@ public class ListView : ItemsView<Cell>, IListViewController, IElementConfigurat
 
 		public static readonly BindableProperty SeparatorColorProperty = BindableProperty.Create("SeparatorColor", typeof(Color), typeof(ListView), Color.Default);
 
+		public static readonly BindableProperty SpinnerColorProperty = BindableProperty.Create(nameof(SpinnerColor), typeof(Color), typeof(ListView), Color.Black);
+
 		readonly Lazy<PlatformConfigurationRegistry<ListView>> _platformConfigurationRegistry;
 
 		BindingBase _groupDisplayBinding;
@@ -217,6 +219,12 @@ public Color SeparatorColor
 			set { SetValue(SeparatorColorProperty, value); }
 		}
 
+		public Color SpinnerColor
+		{
+			get { return (Color)GetValue(SpinnerColorProperty); }
+			set { SetValue(SpinnerColorProperty, value); }
+		}
+
 		public SeparatorVisibility SeparatorVisibility
 		{
 			get { return (SeparatorVisibility)GetValue(SeparatorVisibilityProperty); }

Xamarin.Forms.CustomAttributes/TestAttributes.cs

@@ -428,7 +428,8 @@ public enum ListView
 			GroupDisplayBinding,
 			GroupShortNameBinding,
 			ScrollTo,
-			FastScroll
+			FastScroll,
+			ColoredSpinner
 		}
 
 		public enum TableView

Xamarin.Forms.Platform.Android/Renderers/ListViewRenderer.cs

@@ -163,6 +163,7 @@ protected override void OnElementChanged(ElementChangedEventArgs<ListView> e)
 				UpdateIsSwipeToRefreshEnabled();
 				UpdateFastScrollEnabled();
 				UpdateSelectionMode();
+				UpdateSpinnerColor();
 			}
 		}
 
@@ -200,6 +201,8 @@ protected override void OnElementPropertyChanged(object sender, PropertyChangedE
 				UpdateFastScrollEnabled();
 			else if (e.PropertyName == ListView.SelectionModeProperty.PropertyName)
 				UpdateSelectionMode();
+			else if (e.PropertyName == ListView.SpinnerColorProperty.PropertyName)
+				UpdateSpinnerColor();
 		}
 
 		protected override void OnLayout(bool changed, int l, int t, int r, int b)
@@ -415,6 +418,12 @@ void UpdateSelectionMode()
 			}
 		}
 
+		void UpdateSpinnerColor()
+		{
+			if (_refresh != null)
+				_refresh.SetColorSchemeColors(Element.SpinnerColor.ToAndroid());
+		}
+
 		internal class Container : ViewGroup
 		{
 			IVisualElementRenderer _child;

Xamarin.Forms.Platform.iOS/Renderers/ListViewRenderer.cs

@@ -248,6 +248,7 @@ protected override void OnElementChanged(ElementChangedEventArgs<ListView> e)
 				UpdateSeparatorColor();
 				UpdateSeparatorVisibility();
 				UpdateSelectionMode();
+				UpdateSpinnerColor();
 
 				var selected = e.NewElement.SelectedItem;
 				if (selected != null)
@@ -286,6 +287,8 @@ protected override void OnElementPropertyChanged(object sender, PropertyChangedE
 				UpdatePullToRefreshEnabled();
 			else if (e.PropertyName == Xamarin.Forms.ListView.SelectionModeProperty.PropertyName)
 				UpdateSelectionMode();
+			else if (e.PropertyName == Xamarin.Forms.ListView.SpinnerColorProperty.PropertyName)
+				UpdateSpinnerColor();
 		}
 
 		NSIndexPath[] GetPaths(int section, int index, int count)
@@ -673,6 +676,13 @@ void UpdateSelectionMode()
 			}
 		}
 
+		void UpdateSpinnerColor()
+		{
+			var color = Element.SpinnerColor;
+
+			if (_tableViewController != null)
+				_tableViewController.UpdateSpinnerColor(color.ToUIColor());
+		}
 
 		internal class UnevenListViewDataSource : ListViewDataSource
 		{
@@ -1409,6 +1419,12 @@ public override void ViewWillAppear(bool animated)
 			UpdateIsRefreshing(true);
 		}
 
+		public void UpdateSpinnerColor(UIColor color)
+		{
+			if (RefreshControl != null)
+				RefreshControl.TintColor = color;
+		}
+
 		protected override void Dispose(bool disposing)
 		{
 			if (_disposed)