如何在 xamarin 中使用 OnPageScrollStateChanged

Question

如果视图寻呼机的状态发生变化，我会卡在需要隐藏列表视图的位置。即，如果我在视图寻呼机中从片段 1 滑动到片段二，我希望隐藏列表视图。这可能是通过 OnPageScrollStateChanged 实现的，我不知道 xamarin studio 上的实现。

Answer 1

以下可能是问题的解决方法

public class HomePageActivity : FragmentActivity, Android.Support.V4.View.ViewPager.IOnPageChangeListener
    {
protected override void OnCreate (Bundle bundle)
        {
            base.OnCreate (bundle);

            // Create your application here
            SetContentView(Resource.Layout.home);
var viewPager_up = FindViewById<Android.Support.V4.View.ViewPager>(Resource.Id.viewPager_up);
viewPager_up.AddOnPageChangeListener (this);

}
public void OnPageScrollStateChanged (int state)
        {
            Console.WriteLine ("OnPageScrollStateChanged "+" "+state);
        }
        public void OnPageScrolled (int position, float positionOffset, int positionOffsetPixels){
Console.WriteLine ("OnPageScrolled "+" "+position);
}

        public void OnPageSelected (int position)
        {
            Console.WriteLine ("OnPageSelected"+" "+position);


        }
}

Answer 2

作为记录：以下是弹出事件的方式。

OnPageScrollStateChanged state = 2 (SCROLL_STATE_SETTLING)==> start scrolling 

onPageSelected ==> a page has been selected (before start scrolling to it), check pos.

onPageScrolled ==> called many times while scrolling (~50% for old pos, ~50% for new pos)

OnPageScrollStateChanged state = 0 (SCROLL_STATE_IDLE)==> on end scroll (settled)

对于遇到的任何人！

如何在 xamarin 中使用 OnPageScrollStateChanged

how to use OnPageScrollStateChanged in xamarin

c#

xamarin.android

android-viewpager

xamarin