[英]How do I bind to `ItemClick` for a `MvxLinearLayout`?
I have a ScrollView
which originally wrapped two MvxListView
controls. 我有一个最初包含两个MvxListView
控件的ScrollView
。
Having ListView
controls in a ScrollView
isn't supported by Android though, which makes sense, because they both try to fill the parent height and provide their own scrolling logic. Android中不支持在ScrollView
中使用ListView
控件,这是有道理的,因为它们都试图填充父高度并提供自己的滚动逻辑。
What I want is two unscrollable lists with their full height inside my ScrollView
. 我想要的是两个不可滚动的列表,它们在我的ScrollView
的全高。 ListView
which MvxListView
extends doesn't support this without hacking the height manually. MvxListView
扩展的ListView
不支持此操作而不会手动破解高度。
The reason I want this is because I have two separate lists that I have bound to separate sources and they both have their own header. 我想要这个的原因是因为我有两个单独的列表,我必须将它们分开来源,它们都有自己的标题。 I need all of this to be scrollable within one ScrollView
. 我需要在一个ScrollView
可以滚动所有这些。
Then I found MvxLinearLayout
which is a bindable LinearLayout
which has an ItemSource
property I can bind to. 然后我找到了MvxLinearLayout
,它是一个可绑定的LinearLayout
,它有一个我可以绑定的ItemSource
属性。 It works excellent, it shows my items and get the full height of all items so I can scroll both my lists in my ScrollView
. 它工作得很好,它显示我的项目并获得所有项目的全部高度,因此我可以滚动我的ScrollView
两个列表。 The problem is that it doesn't seem to have an ItemClick
property, so I don't have a way to get user input from my list. 问题是它似乎没有ItemClick
属性,所以我没有办法从我的列表中获取用户输入。
Does anyone know a clean way of doing this in a bindable manner? 有没有人知道以可绑定的方式做到这一点的干净方式? I don't want to attach onItemClick
handlers in my code behind. 我不想在后面的代码中附加onItemClick
处理程序。 Is there another MvvmCross control that can do what I want? 还有另一个MvvmCross控件可以做我想要的吗?
You can extend MvxLinearLayout to support ItemClick
: 您可以扩展MvxLinearLayout以支持ItemClick
:
public class MvxClickableLinearLayout : MvxLinearLayout
{
public MvxClickableLinearLayout(Context context, IAttributeSet attrs)
: this(context, attrs, new MvxClickableLinearLayoutAdapter(context))
{
}
public MvxClickableLinearLayout(Context context, IAttributeSet attrs, MvxClickableLinearLayoutAdapter adapter)
: base(context, attrs, adapter)
{
var mvxClickableLinearLayoutAdapter = Adapter as MvxClickableLinearLayoutAdapter;
if (mvxClickableLinearLayoutAdapter != null)
{
mvxClickableLinearLayoutAdapter.OnItemClick = OnItemClick;
}
}
public ICommand ItemClick { get; set; }
public void OnItemClick(object item)
{
if (ItemClick != null && ItemClick.CanExecute(item))
{
ItemClick.Execute(item);
}
}
}
Adapter: 适配器:
public class MvxClickableLinearLayoutAdapter : MvxAdapterWithChangedEvent, View.IOnClickListener
{
public delegate void ItemClickDelegate(object item);
public ItemClickDelegate OnItemClick;
public MvxClickableLinearLayoutAdapter(Context context)
: base(context)
{
}
public void OnClick(View view)
{
var mvxDataConsumer = view as IMvxDataConsumer;
if (mvxDataConsumer != null && OnItemClick != null)
{
OnItemClick(mvxDataConsumer.DataContext);
}
}
protected override View GetView(int position, View convertView, ViewGroup parent, int templateId)
{
View view = base.GetView(position, convertView, parent, templateId);
view.SetOnClickListener(this);
return view;
}
}
Now you can bind to ItemClick
just like you would do with a ListView
: 现在,您可以像使用ListView
一样绑定到ItemClick
:
local:MvxBind="ItemClick SomeCommand"
You need to add a Click binding to the separate items inside the layout. 您需要将Click绑定添加到布局内的单独项目。 You can add a Click to any layout like this: 您可以将Click添加到任何布局,如下所示:
<RelativeLayout
android:background="?android:attr/selectableItemBackground"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/relativeLayout1"
local:MvxBind="Click SomeCommand">
Have you tried to specify an Item Template for the MvxLinearLayout? 您是否尝试为MvxLinearLayout指定项模板? eg, local:MvxItemTemplate="@layout/item_template"
? 例如, local:MvxItemTemplate="@layout/item_template"
? You can setup the MvvmCross Click binding inside the Item Template on the controls you want to handle clicks for. 您可以在要处理点击的控件上的项目模板内设置MvvmCross Click绑定。
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