How to show busy indicator on ListViewItem using toggle switch

The SfListView allows to display ActivityIndicator for an item when loading its data in the background. To do this, load both ActivityIndicator and a toggle switch in the same row of a Grid element inside the ItemTemplate of SfListView. The busy indicator and toggle switch can be enabled and disabled by using the IsButtonVisible and IsIndicatorVisible properties respectively in the model class. The ActivityIndicator remains visible when the toggle switch is enabled.

<ContentPage xmlns:syncfusion="clr-namespace:Syncfusion.ListView.XForms;assembly=Syncfusion.SfListView.XForms">
    <ContentPage.BindingContext>
        <local:ContactInfoRepository x:Name="ViewModel" />
    </ContentPage.BindingContext>
    <syncfusion:SfListView x:Name="listView" AutoFitMode="Height" BackgroundColor="#d3d3d3" SelectionMode="None" ItemsSource="{Binding NewContactInfo}">
        <syncfusion:SfListView.ItemTemplate>
            <DataTemplate>
                <Frame HasShadow="True" Margin="5,5,5,0">
                <Grid Padding="5">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*" />
                        <RowDefinition Height="*" />
                    </Grid.RowDefinitions>
                    <Label Text="{Binding ContactName}" FontAttributes="Bold" FontSize="19" />
                  <Switch Grid.Row="1" Grid.Column="1" IsVisible="{Binding IsButtonVisible}" IsToggled="{Binding IsChecked}" Toggled="Switch_Toggled"/>

                  <Label Grid.Row="1" Text="{Binding ContactNo}" FontSize="15" IsVisible="{Binding IsDescriptionVisible}" />
                    <ActivityIndicator Grid.Row="1" IsEnabled="True" IsRunning="True" IsVisible="{Binding IsIndicatorVisible}" />
                </Grid>
                </Frame>
            </DataTemplate>
        </syncfusion:SfListView.ItemTemplate>
    </syncfusion:SfListView>
</ContentPage>

In the Toggled event of the switch, get the row data from its BindingContext and alter the Bool values accordingly.

public partial class MainPage : ContentPage
{
  private Random random = new Random();
  public MainPage()
  {
     InitializeComponent();
  }

  private async void Switch_Toggled(object sender, ToggledEventArgs e)
  {
    var model = ((sender as Switch).BindingContext as ContactInfo);
    if (model.IsChecked == true)
    {
        model.ContactNo = random.Next(100, 400).ToString() + "-" + random.Next(500, 800).ToString() + "-" + random.Next(1000, 2000).ToString();
        model.IsDescriptionVisible = false;
        model.IsIndicatorVisible = true;
        await Task.Delay(2000);
        model.IsDescriptionVisible = true;
        model.IsIndicatorVisible = false;
        model.IsChecked = false;
    }
    else
    {
        model.IsIndicatorVisible = false;
    }
  }
}

To know more about showing busy indicator on listview items usig toggle switch, please refer our documentation here.