Answers

• Amit_Malhi01 Member ✭✭

  December 2019

  Disable Context Action click

  ViewCell.ContextActions.Clear();

  0
• ColeX Member, Xamarin Team Xamurai

  December 2019 edited December 2019 Accepted Answer

  1. Overlap a transparent button on the listview when Long press the viewcell (context action appear) .
  2. Dismiss context action when tap on the transparent button .

  Xaml

   <Grid>
      <Grid.RowDefinitions>
          <RowDefinition Height="auto"/>
          <RowDefinition Height="auto"/>
      </Grid.RowDefinitions>
      <ListView x:Name="listView" ItemSelected="OnItemSelected" ItemTapped="listView_ItemTapped">
  
          <ListView.ItemTemplate>
              <DataTemplate>
                  <ViewCell>
                      <ViewCell.ContextActions>
                          <MenuItem Clicked="OnMore" CommandParameter="{Binding .}" Text="More" />
                          <MenuItem Clicked="OnDelete" CommandParameter="{Binding .}" Text="Delete" IsDestructive="True" />
                      </ViewCell.ContextActions>
                      <StackLayout HorizontalOptions="StartAndExpand" Orientation="Horizontal">
                          <StackLayout Padding="5,0,0,0" VerticalOptions="StartAndExpand" Orientation="Vertical">
                              <Label Text="{Binding .}" VerticalTextAlignment="Center" FontSize="Medium" />
                              <Label Text="hint: trigger a context action" VerticalTextAlignment="Center" FontSize="Small" />
                          </StackLayout>
                      </StackLayout>
                  </ViewCell>
              </DataTemplate>
          </ListView.ItemTemplate>
      </ListView>
      <Button x:Name="button" 
              IsVisible="False" 
              BackgroundColor="Transparent"
              Clicked="Button_Clicked_1" 
              HorizontalOptions="FillAndExpand"
              VerticalOptions="FillAndExpand"/>
  </Grid>
  

  MainPage

     public ContextActionsXaml ()
      {
          InitializeComponent ();
  
          items = new ObservableCollection<string> { "alpha", "beta", "gamma", "delta", "epsilon" };
          //listView.ItemsSource = items;
          listView.SetBinding (ListView.ItemsSourceProperty, new Binding ("."));
          listView.BindingContext = items;
  
          MessagingCenter.Subscribe<object>(this, "Hi", (sender) =>
          {
              button.IsVisible = true;
  
          });
      }
  
  
     private void Button_Clicked_1(object sender, EventArgs e)
      {
          if (Device.RuntimePlatform == Device.Android)
              DependencyService.Get<IContextManager>().CloseLastContextMenu();
          button.IsVisible = false;
      }
  

  Interface in Forms

      public interface IContextManager
      {
          void CloseLastContextMenu();
      }
  

  Implementation

  [assembly: Xamarin.Forms.Dependency(typeof(ContextManager))]
  namespace WorkingWithListview.Android
  {
      public class ContextManager : IContextManager
      {
          public static global::Android.Support.V7.View.ActionMode LastActionMode { get; set; }
  
          public void CloseLastContextMenu()
          {
              LastActionMode?.Finish();
          }
      }
  }
  

  MainActivity

      public override global::Android.Support.V7.View.ActionMode  StartSupportActionMode(global::Android.Support.V7.View.ActionMode.ICallback callback)
          {
              MessagingCenter.Send<object>(this, "Hi");
              return ContextManager.LastActionMode = base.StartSupportActionMode(callback);
          }
  
          public override void OnSupportActionModeFinished(global::Android.Support.V7.View.ActionMode mode)
          {
              ContextManager.LastActionMode = null;
              base.OnSupportActionModeFinished(mode);
          }
  

  

  Refer https://forums.xamarin.com/discussion/comment/308577/#Comment_308577 .

  5
• toughcanny Member ✭✭

  December 2019

  Hi @ColeX

  Thanks It works only when we click outside listview (that transparent button appears below listview)
  It wouldn't work when we click any where on screen, for example clicking an item on list view item should close that.

  0
• ColeX Member, Xamarin Team Xamurai

  December 2019

  Check my project .

  Xamarin_Forms___Working_with_ListView (1).zip 3M

  0
• toughcanny Member ✭✭

  December 2019

  Thanks @ColeX

  The difference was that listview was inside StackLayout, after moving it to inside Grid it Works.

  0