MvxRecyclerView 项目有空 ViewModel

Question

在我的 xamarin.droid 应用程序中，我有下一个布局 MvxRecyclerView

<MvxRecyclerView 
      ...
      local:MvxItemTemplate="@layout/symbol_item_fragment"
      local:MvxBind="ItemsSource Items" />

symbol_item_fragment 定义为

<?xml version="1.0" encoding="utf-8"?>
<fragment 
      ...
      android:name="mobile.droid.company.fragments.SymbolItemFragment" />

我定义SymbolItemFragment为

[Register("mobile.droid.company.fragments.SymbolItemFragment")]
public class SymbolItemFragment : MvxFragment<SymbolItemViewModel>
{
    public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        base.OnCreateView(inflater, container, savedInstanceState);
        var view = this.BindingInflate(Resource.Layout.symbol_item_view, null);

       //ViewModel is null

       return view;        
    }
}

我可以看到 Fragments 已正确呈现，但出于某种原因未为其定义 ViewModel。

我错过了什么？

Answer 1

我认为扩展方法EnsureBindingContextIsSet()会解决它。

public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    this.EnsureBindingContextIsSet (savedInstanceState);
    base.OnCreateView(inflater, container, savedInstanceState);
    var view = this.BindingInflate(Resource.Layout.symbol_item_view, null);

   return view;        
}

Answer 2

正如@CheeseBaron 在对问题的评论中所说

MvxFragments are not inflatable through XML, or well they are, but they won't ever have a ViewModel attached.

因此，目前还没有针对此方法的解决方案。

MvxRecyclerView 项目有空 ViewModel

MvxRecyclerView items have null ViewModel

c#

android

xamarin.android

mvvmcross

xamarin