如何通过代码绑定到MvxRecyclerView ItemsSource?

时间:2016-06-02 23:20:02

标签: android xamarin binding mvvmcross

我在我的片段中使用了MvxRecyclerView:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
  android:id="@+id/Headline"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_centerHorizontal="true"
  android:layout_marginTop="50dp"
  android:text="My Headline" />
<MvvmCross.Droid.Support.V7.RecyclerView.MvxRecyclerView
  android:id="@+id/RecyclerView"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_below="@id/Headline"
  android:layout_marginTop="50dp" />
</RelativeLayout>

这是片段代码:

[MvxFragment(typeof(MainViewModel), Resource.Id.Main_ViewPager)]
[Register("my.app.fragments.MyFragment")]
public class MyFragment : BaseFragment<MyViewModel>
{
    private MvxRecyclerView recyclerView;

    public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        base.OnCreateView(inflater, container, savedInstanceState);

        var view = this.BindingInflate(Resource.Layout.MyFragment, null);

        this.recyclerView = view.FindViewById<MvxRecyclerView>(Resource.Id.RecyclerView);
        this.recyclerView.ItemTemplateId = Resource.Layout.MyCell;

        var set = this.CreateBindingSet<MyFragment, MyViewModel>();
        set.Bind(this.recyclerView).For(x => x.ItemsSource).To(x => x.Items);
        set.Apply();

        return view;
    }
}

ViewModel:

public class MyViewModel : MvxViewModel
{
    ....

    private ObservableCollection<T> items;
    public ObservableCollection<T> Items
    {
        get { return this.items; }
        set
        {
            this.items = value;
            this.RaisePropertyChanged(() => this.Items);
        }
    }

    ....
}

问题是,MvxRecyclerView不显示任何数据。 但是,当我在axml中定义ItemTemplateId和Binding时(例如local:MvxItemTemplate =&#34; ...&#34;,local:MvxBind =&#34; ItemsSource Items&#34;)。

我的目标不是在axml中定义它。我想利用在代码中使用这些属性的优势(例如重命名或重构问题)。

是否可以在Code中定义这些绑定?

1 个答案:

答案 0 :(得分:1)

在xml中设置MvxItemTemplate并在片段中创建Items-binding。