在 Collectionview 上设置选择背景颜色并保持 material 波纹

Question

我有一个像这样的 Collectionview：

                         <CollectionView SelectionMode="Single" WidthRequest="200" HeightRequest="144" x:Name="listViewLanguageMenu"  HorizontalOptions="End" VerticalOptions="Start" ItemSizingStrategy="MeasureAllItems">
                         <CollectionView.ItemTemplate >
                             <DataTemplate >
                                 <StackLayout Style="{StaticResource languageMenuStyle}" HeightRequest="40"  Padding="25,4,5,4" Margin="0" Spacing="0" HorizontalOptions="End" VerticalOptions="Center"  Orientation="Horizontal">
                                     <Image VerticalOptions="CenterAndExpand" Aspect="AspectFit" Source="{Binding ImageSourceLanguage}"></Image>
                                     <Label VerticalOptions="CenterAndExpand" FontSize="18" Margin="5,0,0,0"  VerticalTextAlignment="Center" Text="{Binding LanguageName}"></Label>
                                 </StackLayout>
                             </DataTemplate>
                         </CollectionView.ItemTemplate>
                     </CollectionView>

如果我像这样在样式中设置背景：

  <Style TargetType="StackLayout" x:Key="languageMenuStyle">        
     <Setter Property="VisualStateManager.VisualStateGroups">
         <VisualStateGroupList>
             <VisualStateGroup x:Name="CommonStates">
                 <VisualState x:Name="Selected">
                     <VisualState.Setters>
                         <Setter Property="SelectableItemBackground" Value="{StaticResource buttonBackgroundColor}"/>
                         <Setter Property="Visual" Value="Material"></Setter>
                     </VisualState.Setters>
                 </VisualState>
                 <VisualState x:Name="Normal" >
                     <VisualState.Setters>
                         <Setter Property="Visual" Value="Material"></Setter>
                     </VisualState.Setters>
                 </VisualState>
             </VisualStateGroup>
         </VisualStateGroupList>
     </Setter>
 </Style>

选择颜色现在已成功更改，但我不再有标准颜色在选择时具有的 Material 波纹。如何更改选择颜色并产生 material 波纹？

谢谢。

你好，
我

Answer 1

我用你的代码来测试，你为stacklayout创建了languageMenuStyle样式，但是stacklayout没有SelectableItemBackground 属性，我修改了stacklayout的languageMenuStyle，collectionview在改变时仍然有material波纹集合视图选择颜色。

 <Style x:Key="languageMenuStyle" TargetType="StackLayout">
        <Setter Property="VisualStateManager.VisualStateGroups">
            <VisualStateGroupList>
                <VisualStateGroup x:Name="CommonStates">
                    <VisualState x:Name="Normal" />
                    <VisualState x:Name="Selected">
                        <VisualState.Setters>
                            <Setter Property="BackgroundColor" Value="Green" />
                        </VisualState.Setters>
                    </VisualState>
                </VisualStateGroup>
            </VisualStateGroupList>
        </Setter>
    </Style>

在 Collectionview 上设置选择背景颜色并保持 material 波纹

set selection backgroundcolor on Collectionview and keep the material ripple

xaml

xamarin

xamarin.forms

material-design-in-xaml