How Can i change the default background color of selected listview item.?

Maheshln

Tried this one but did not work .
private void ViewCell_Tapped(object sender, EventArgs e)
{
var viewcell = (ViewCell)sender;
if (viewcell != null) {
viewcell.View.BackgroundColor = Color.Blue;
}

    }

SmartMan

Please go through this

https://developer.xamarin.com/guides/xamarin-forms/user-interface/listview/customizing-cell-appearance/

https://developer.xamarin.com/samples/xamarin-forms/WorkingWithListview/

Try the below code

[assembly: ExportRenderer(typeof(ViewCell), typeof(ViewCellTransparent))]
namespace MyApp.iOS.Renderers
{
public class ViewCellTransparent : ViewCellRenderer
{
public override UITableViewCell GetCell(Cell item, UITableViewCell reusableCell, UITableView tv)
{
var cell = base.GetCell(item, reusableCell, tv);
if (cell != null)
{
// Disable native cell selection color style - set as Transparent
cell.SelectionStyle = UITableViewCellSelectionStyle.None;
}
return cell;
}
}
}

jezh

We could use custom renderer to change that property on each platform. Firstly, create your own view cell class:

  public class MyViewCell: ViewCell  
  {
  }

For iOS

   [assembly: ExportRenderer(typeof(MyViewCell), typeof(ViewCellRendererForiOS))]
   namespace ChangeItmColorApp.iOS
 {
       class ViewCellRendererForiOS: ViewCellRenderer
    {
          public override UITableViewCell GetCell(Cell item, UITableViewCell reusableCell, UITableView tv)
         {
        var cell = base.GetCell(item, reusableCell, tv);

        cell.SelectedBackgroundView = new UIView { BackgroundColor = UIColor.Red };

        return cell;
       }
    }
 }

For Android

 [assembly: ExportRenderer(typeof(MyViewCell), typeof(ViewCellRendererForAndroid))]
 namespace Demo.Droid
{
public class ViewCellRendererForAndroid : ViewCellRenderer
 {
    private Android.Views.View _cellCore;
    private bool _selected = false;

    protected override Android.Views.View GetCellCore(Cell item, Android.Views.View convertView, ViewGroup parent, Context context)
    {
        _cellCore = base.GetCellCore(item, convertView, parent, context);
        return _cellCore;
    }

    protected override void OnCellPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs args)
    {
        base.OnCellPropertyChanged(sender, args);
        if (args.PropertyName == "IsSelected")
        {
            _selected = !_selected;
            var extendedViewCell = sender as ViewCell;
            if (_selected)
                _cellCore.SetBackgroundColor(Android.Graphics.Color.Red);
            else
                _cellCore.SetBackgroundColor(Android.Graphics.Color.Transparent);
        }
      }
    }
 }

Moreover if you want to change the color on forms dynamically instead of hard code. Try to define a bindable property in your custom view cell class. Then configure it on each platform.

Attachment is a whole sample you can refer to.

deczaloth

@jezh
Thanks for your answer.

I am trying your demo using XF 3.6 (o am constricted to that version due to another pieces of software!), for iOS it does not work at all. Is there any way i can achieve that same result for XF 3.6?

ChiChi

@jezh said:
We could use custom renderer to change that property on each platform. Firstly, create your own view cell class:

  public class MyViewCell: ViewCell  
  {
  }

For iOS

   [assembly: ExportRenderer(typeof(MyViewCell), typeof(ViewCellRendererForiOS))]
   namespace ChangeItmColorApp.iOS
 {
       class ViewCellRendererForiOS: ViewCellRenderer
    {
          public override UITableViewCell GetCell(Cell item, UITableViewCell reusableCell, UITableView tv)
         {
        var cell = base.GetCell(item, reusableCell, tv);

        cell.SelectedBackgroundView = new UIView { BackgroundColor = UIColor.Red };

        return cell;
       }
    }
 }

For Android

 [assembly: ExportRenderer(typeof(MyViewCell), typeof(ViewCellRendererForAndroid))]
 namespace Demo.Droid
{
public class ViewCellRendererForAndroid : ViewCellRenderer
 {
    private Android.Views.View _cellCore;
    private bool _selected = false;

    protected override Android.Views.View GetCellCore(Cell item, Android.Views.View convertView, ViewGroup parent, Context context)
    {
        _cellCore = base.GetCellCore(item, convertView, parent, context);
        return _cellCore;
    }

    protected override void OnCellPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs args)
    {
        base.OnCellPropertyChanged(sender, args);
        if (args.PropertyName == "IsSelected")
        {
            _selected = !_selected;
            var extendedViewCell = sender as ViewCell;
            if (_selected)
                _cellCore.SetBackgroundColor(Android.Graphics.Color.Red);
            else
                _cellCore.SetBackgroundColor(Android.Graphics.Color.Transparent);
        }
      }
    }
 }

Moreover if you want to change the color on forms dynamically instead of hard code. Try to define a bindable property in your custom view cell class. Then configure it on each platform.

Attachment is a whole sample you can refer to.

I am trying you demo code.But Other color like Red or blue is OK and When i change to Transparent the background color is change back to orange and I need to change the background color to transparent .
By the way, i found the another way for android=> Resource=>Style.xml=> add this code( "
item name="android:colorActivatedHighlight" android:color/transparent" ).
It only work for Android.I don't know how for IOS. I need to change IOS too.Anybody Can Help me.