Xamarin.Forms Change the Orange ListView Backgroud-Color on tappping cell to white or transparent - xamarin.forms

Question

I cant find solution about this orange color? Do i need to write a renderer or can change from resources in Android and IOS?

Answer 1

Yes,if you want to change ListView selecteditem background color, need to use custom render to do this in Xamarin.Forms.
In the PCL, create a class name is ExtendedViewCell which should inherit any ViewCell.
public class ExtendedViewCell : ViewCell
{
public static readonly BindableProperty SelectedBackgroundColorProperty =
BindableProperty.Create("SelectedBackgroundColor",
typeof(Color),
typeof(ExtendedViewCell),
Color.Default);
public Color SelectedBackgroundColor
{
get { return (Color)GetValue(SelectedBackgroundColorProperty); }
set { SetValue(SelectedBackgroundColorProperty, value); }
}
}
In Android project, create a class name as ExtendedViewCellRenderer and make sure to add renderer registration for our ExtendedViewCell class above the namespace.
[assembly: ExportRenderer(typeof(ExtendedViewCell), typeof(ExtendedViewCellRenderer))]
namespace demo3.Droid
{
public class ExtendedViewCellRenderer : ViewCellRenderer
{
private Android.Views.View _cellCore;
private Drawable _unselectedBackground;
private bool _selected;
protected override Android.Views.View GetCellCore(Cell item,
Android.Views.View convertView,
ViewGroup parent,
Context context)
{
_cellCore = base.GetCellCore(item, convertView, parent, context);
_selected = false;
_unselectedBackground = _cellCore.Background;
return _cellCore;
}
protected override void OnCellPropertyChanged(object sender, PropertyChangedEventArgs args)
{
base.OnCellPropertyChanged(sender, args);
if (args.PropertyName == "IsSelected")
{
_selected = !_selected;
if (_selected)
{
var extendedViewCell = sender as ExtendedViewCell;
_cellCore.SetBackgroundColor(extendedViewCell.SelectedBackgroundColor.ToAndroid());
}
else
{
_cellCore.SetBackground(_unselectedBackground);
}
}
}
}
}
Then you can set color for listview SelectedBackgroundColor.
<ListView ItemsSource="{Binding students}">
<ListView.ItemTemplate>
<DataTemplate>
<local:ExtendedViewCell SelectedBackgroundColor="White">
<StackLayout Orientation="Horizontal">
<Label Text="{Binding Username}" TextColor="Yellow" />
<Label Text="{Binding Age}" TextColor="Blue" />
</StackLayout>
</local:ExtendedViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
More detail info and steps in ios platform, you can take a look:
https://blog.wislon.io/posts/2017/04/11/xamforms-listview-selected-colour
Update:
In ios project, create a class name as ExtendedViewCellRenderer and make sure to add renderer registration for our ExtendedViewCell class above the namespace.
[assembly: ExportRenderer(typeof(ExtendedViewCell), typeof(ExtendedViewCellRenderer))]
namespace xamformsdemo.iOS
{
public class ExtendedViewCellRenderer : ViewCellRenderer
{
public override UITableViewCell GetCell(Cell item, UITableViewCell reusableCell, UITableView tv)
{
var cell = base.GetCell(item, reusableCell, tv);
var view = item as ExtendedViewCell;
cell.SelectedBackgroundView = new UIView
{
BackgroundColor = view.SelectedBackgroundColor.ToUIColor(),
};
return cell;
}
}
}