在我的主表单中接收我的viewpager的位置

Question

我使用像carousel这样的包含三个图像的viewpager，所以我想获得每个都是1,2,3的位置并将其显示为消息

示例：如果我拖到第二个，则返回2，如果我移动到3则返回3

// my form
 ImageAdapter adapter = new ImageAdapter(this);
 var viewPager = FindViewById<ViewPager>(Resource.Id.viewPager);
 viewPager.PersistentDrawingCache = Android.Views.PersistentDrawingCaches.ScrollingCache;
 viewPager.Adapter = adapter;

这是我的班级：

   public class ImageAdapter : PagerAdapter
   {
    private Context context;
    private string[] imageList = {
        "image1",
         "image2",
          "image3",};

    public ImageAdapter(Context context)
    {
        this.context = context;
    }

    public override int Count
    {
        get
        {
            return imageList.Length;
        }
    }

    public override bool IsViewFromObject(View view, Java.Lang.Object objectValue)
    {
        return view == ((ImageView)objectValue);
    }

    public override Java.Lang.Object InstantiateItem(View container, int position)
    {
        ImageView imageView = new ImageView(context);
        imageView.SetScaleType(ImageView.ScaleType.CenterCrop);
        Koush.UrlImageViewHelper.SetUrlDrawable(imageView, imageList[position]);
        ((ViewPager)container).AddView(imageView, 0);
        return imageView;
    }

    public override void DestroyItem(View container, int position, Java.Lang.Object objectValue)
    {
        ((ViewPager)container).RemoveView((ImageView)objectValue);
    }
}

Answer 1

viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){
        @Override
        public void onPageSelected(int position) {
            super.onPageSelected(position);
            System.out.println("position = " + position);
        }
    });