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How to handle the numerous data in Xamarin.Android Carousel using LoadMore options?

3 mins read

Carousel control can handle the numerous data using UI virtualization by maintaining only the view port items into it.

 

xamarin_virtualization.png

 

 

Properties are used to achieve UI Virtualization options

 

Properties

Data Type

Default Value

Usage

EnableVirtualization

 

Boolean

false

Enable or disable UI Virtualization options in carousel control

ItemsSource

IEnumerable

null

To load the collection of data’s

 

The following code example illustrates the way to use the UI Virtualization feature on carousel control.

 

In MainActivity:

C#

public class MainActivity : Activity
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
 
        LinearLayout linearLayout = new LinearLayout(this);
        linearLayout.SetBackgroundColor(Color.White);
        linearLayout.LayoutParameters = new ViewGroup.LayoutParams(500, 500);
        SfCarousel sfCarousel = new SfCarousel(this);
        sfCarousel.EnableVirtualization= true; 
        sfCarousel.ViewMode = ViewMode.Linear;
        sfCarousel.ItemWidth = 400;
        sfCarousel.ItemHeight = 400;
 
        //collection
        List<string> collection = new List<string>();
        for (int i = 1; i <= 10000;i++)
        {
            collection.Add("Item " + i.ToString());
        }
        sfCarousel.ItemsSource = collection;
        sfCarousel.Adapter = new MyCarouselAdapter(this);
        linearLayout.AddView(sfCarousel);
        SetContentView(linearLayout);
 
    }
}
 

 

Adapter View Definitions:

C#

/// <summary>
/// My carousel adapter.
/// </summary>
public class MyCarouselAdapter:ICarouselAdapter
{
    #region myContext
    /// <summary>
    /// My context.
    /// </summary>
    Context myContext;
    #endregion
 
    #region MyCarouselAdapter
    /// <summary>
    /// Initializes a new instance of the <see cref="T:LoadMore.MyCarouselAdapter"/> class.
    /// </summary>
    /// <param name="context">Context.</param>
    public MyCarouselAdapter(Context context)
    {
        myContext = context;
    }
    #endregion
 
    #region view renderer method
    public View GetItemView(SfCarousel carousel, int index)
    {
        TextView textView = new TextView(myContext);
        textView.SetBackgroundColor(Color.Indigo);
        textView.TextAlignment = TextAlignment.Center;
        textView.Gravity = GravityFlags.Center;
        textView.TextSize = 15;
        textView.Text = (carousel.ItemsSource as List<string>)[index];
        textView.SetTextColor(Color.White);
        return textView;
    }
    #endregion
}

 

 

Sample:

https://www.syncfusion.com/downloads/support/directtrac/general/ze/VirtualizationSample-954378307

 

Conclusion

I hope you enjoyed learning about how to handle the numerous data in Carousel using LoadMore options.

You can refer to our Xamarin.Android Carousel feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial
to check out our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forumsDirect-Trac, or feedback portal. We are always happy to assist you!


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