Question

我已将视图布局定义如下

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:local="http://schemas.android.com/apk/res-auto"
     android:orientation="vertical"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent">
     <Mvx.MvxListView
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"
          local:MvxBind="ItemClick PopulateMetricsCat2Command ; ItemsSource RatingList"
          local:MvxItemTemplate="@layout/item_met2" />
 </LinearLayout>

和List ItemTemplate如下

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:local="http://schemas.android.com/apk/res-auto"
     android:orientation="vertical"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:background="#ffffff">
     <TextView
           android:layout_width="fill_parent"
           android:layout_height="wrap_content"
           android:textSize="20dp"
           local:MvxBind="Text MetricName" />
     <RatingBar
           android:id="@+id/ratingbar"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:numStars="5"
           android:stepSize="1"
           local:MvxBind="Rating ResponseValue" />
  </LinearLayout>

我已经在My MvxListView中对 ItemClick 事件绑定了一个命令，但每当我从List中选择一个项目时，指定的命令就不会被执行 .Control是nat get转移到命令。

该命令如下

    private void DoGoPopulateMetrics(UserRating r)
    {
        ShowViewModel<PopulateMetricsByCat2ViewModel>(r);
    }

为什么不调用此命令？

    private Cirrious.MvvmCross.ViewModels.MvxCommand<StarRating>   
                                                     _ratingSelectedCommand;
    public System.Windows.Input.ICommand ItemSelectedCommand
    {
        get{
            _ratingSelectedCommand = _ratingSelectedCommand ?? new 
             Cirrious.MvvmCross.ViewModels.MvxCommand<StarRating>(DoSelectItem);
            return _ratingSelectedCommand;
        }
    }

    private void DoSelectItem(StarRating r)
    {
        ShowViewModel<PopulateMetricsByCat2ViewModel>(r);
    }

Answer 1

您缺少PopulateMetricsCat2Command

public ICommand PopulateMetricsCat2Command 
{
   get { return new MvxCommand(DoGoPopulateMetrics); }
}

Android MvvmCross中的ItemCLick

1 个答案: