Xamarin mutli选择列表视图 [英] xamarin mutli selection listview

问题描述

一段时间以来，我一直在设法解决我的问题，但我没有找到它，所以我在寻找您的帮助.

It's been a while that i'm trying to get an anwser to my problem, but i didn't find it... So i'm searching for your help.

我在xamarin上工作以制作一个android应用程序，但我不使用Xamarin.Forms(如果我在开始项目时知道的话，我会用它的.

I work on xamarin to make an android application but i dont use Xamarin.Forms (i would have used it, if i knew it when i begin the project

如果您有任何疑问，我会直接问我.

I'll directly to the point, if you have some question, just ask me.

所以我有一个Listview，可以在其中选择2个或更多项目:

So i got a Listview where i can select 2 or more items :

private void _listViewIntervention_ItemClick(object sender, AdapterView.ItemClickEventArgs e)
    {
        _intervention[e.Position].IsSelected = !_intervention[e.Position].IsSelected;
        if (_intervention[e.Position].IsSelected)
            e.View.SetBackgroundColor(Android.Graphics.Color.Rgb(255, 127, 127));
        else
            e.View.SetBackgroundColor(Android.Graphics.Color.Rgb(230, 230, 230));

        _numberInterventionSelected.Text = _intervention.FindAll(elem => elem.IsSelected == true).Count().ToString();
    }

那东西可以工作，但是如果我有一个包含20个项目的列表视图，即我选择了3个项目，那么如果我滚动列表视图，一切都会受到干扰，我的3个突出显示的行将不再存在，并且突出显示将在另一行我从来没有选择.

That thing work but if i have a listview with 20 items i.e and i select 3 items, if i scroll the listview, everything will be disturb and my 3 highlighted rows won't be anymore and the highlight will be on another row that i've never select.

我认为那不是很明显，可能是模糊的.

I think that not that evident and it might be blur.

IMO，当我执行"e.View.SetBackgroundColor"时，我并没有改变好事，但我尝试了很多没用的事. 我可能并没有采取最好的方式做我想做的事.

IMO i'm not changing the good thing when i do the "e.View.SetBackgroundColor" but i've try lot of thing that never worked. I might not going the best way to do what i want to do btw.

我想要的结果是当我滚动列表视图时，没有任何变化，因此我可以选择列表视图的第一项和最后一项.

The result i want is when i scroll the listview, nothing change so i can select the first and the last item of the listview i.e.

我再次在自己身边搜寻，但我对您有所了解... 感谢您的阅读，祝您有美好的一天！

I search again in my side but i count a little on you know... Thanks for reading and have a good day !

推荐答案

经过大量搜索并找到解决方案后，我已经遇到了同样的问题

I have already getting same problem after lot of search and find the solution

在Xamarin自定义适配器中，删除ViewHolder System后，删除Holder系统即可正常工作

In Xamarin custom adapter remove ViewHolder System it's working fine after removing Holder system

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