小编Ole*_*ena的帖子

我有:

public override void OnBackPressed ()
{
base.OnBackPressed ();
}

• 我怎样才能获得我的应用程序的先前状态？

• Xamarin是否具有BackStackEntryCount,我该如何使用它？

  例如,我单击MainMenu-> Study-> Categories-> FirstCategory,如果单击Back,我想要分类.

我需要上一个工作日:

public DateTime GetPreviousWorkDay(DateTime date)
{
    DateTime prevDay = date.AddDays(-1);
    bool isHoliday = IsHoliday(prevDay);
    while (isHoliday || prevDay.DayOfWeek == DayOfWeek.Saturday || prevDay.DayOfWeek == DayOfWeek.Sunday)
    {
        prevDay = prevDay.AddDays(-1);
        isHoliday = IsHoliday(prevDay);
    }
    return prevDay;
}

这种方法安全吗？它可以是无限循环吗？有更简单的方法吗？

我需要使用SetOnTouchListener:

LinearLayout cardLinearLayout = FindViewById<LinearLayout> (Resource.Layout.CardList);
cardLinearLayout.SetOnTouchListener (this);//Can't use THIS, must be argument  with IOnTouchListener type. Where can I get this argument?

我想将它用于ViewFlipper.也许存在其他方式.

我为什么要这样mainLayout==null？

protected override void OnCreate (Bundle bundle)
{
    base.OnCreate (bundle);
    SetContentView (Resource.Layout.Main);
    LinearLayout mainLayout = FindViewById<LinearLayout> (Resource.Layout.Main);//return null
    mainLayout.Touch+=(s,e)=>
    {
         //something
    }
}

如何获取MainLayout或如何添加事件处理程序Touch？

Resource.designer.cs:

public partial class Layout
{
    public const int Main = 2130903041;
    //other
}