单击Viewpager Xamarin Android [英] Click on Viewpager Xamarin Android

问题描述

我是Xamarin Android开发的新手.我已经使用 ViewPager 创建了图像滑块.现在，我想单击该ViewPager的图像.我该如何实现呢? 我已经尝试过了，但是没有用:

I am new to Xamarin Android Development.I have created Image slider using ViewPager.Now I want click on image of that ViewPager.How can I implement that ? I have tried this but not worked:

{
  viewpage = mview.FindViewById<ViewPager> (Resource.Id.viewpager);
  viewpage.Adapter = new itemadapter (ChildFragmentManager);
  viewpage.Click += Viewpage_Click;
}
public void Viewpage_Click (object sender, EventArgs e)
{
    ViewModel.DetailViewCommand.Execute ();
}

推荐答案

如果只有图像滑块，只需在viewpager's适配器中为imageview实现onclick listener.

Just implement onclick listener for imageview in viewpager's adapter if you have only image slider.

编辑:imageslider viewpager的完整资源，可从Web下载图像.

full source of imageslider viewpager that downloads images from web.

public class ImageSliderAdapter : PagerAdapter
    {
        Context _context;
        List<string> _imageUrls;

        public ImageSliderAdapter (Context context, List<string> imageUrls)
        {
            _imageUrls = imageUrls;
            _context = context;
        }

        public override bool IsViewFromObject (Android.Views.View view, Java.Lang.Object @object)
        {
            return view == ((LinearLayout)@object);
        }

        public override int Count {
            get {
                return _imageUrls.Count;
            }
        }

        public override void DestroyItem (ViewGroup container, int position, Java.Lang.Object objectValue)
        {
        }

        public override Java.Lang.Object InstantiateItem (ViewGroup container, int position)
        {

            View view = container;
            var inflater = _context.GetSystemService (Context.LayoutInflaterService) as LayoutInflater;
            view = inflater.Inflate (Resource.Layout.image_slider_item, null);
            var child = view.FindViewById<ImageView> (Resource.Id.image_slider_item);
            child.Click += (o, e) =>
            {
                //your code here
            };

            Bitmap image = null;
            Task.Run (() => {
                URL url = new URL (_imageUrls [position]);
                image = BitmapFactory.DecodeStream (url.OpenConnection ().InputStream);
            }).ContinueWith (t => {
                (_context as MainView).RunOnUiThread (() => {
                    child.SetImageBitmap (image);
                });
            });

            container.AddView (view);
            return view;
        }
    }

活动中:

            var imageViewer = FindViewById<ViewPager> (Resource.Id.pager);
            imageViewer.Adapter = new ImageSliderAdapter (this, imageUrls);

这篇关于单击Viewpager Xamarin Android的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！