接上一篇

从上一篇可以看到，MAUI的Listview控件的子项的高度，在Android系统上，跟Windows上不一致。这是什么原因导致的呢？怎样解决这个问题呢？请查看以下的代码（HtListviewPage.xaml）：

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="HovertreeMaui.HtPages.HtListviewPage"
             Title="Hovertree Listview">
    <ScrollView>
        <VerticalStackLayout>
            <Label 
            Text="My Devices"
            VerticalOptions="Center" 
            HorizontalOptions="Center" FontSize="32" FontAttributes="Bold"  />

            <ListView x:Name="htDeviceView" RowHeight="140"  >
                <ListView.ItemTemplate>
                    <DataTemplate>
                        <ViewCell>
                        <Grid>
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="*" />
                                </Grid.RowDefinitions>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="*" />
                                    <ColumnDefinition Width="*" />
                                    <ColumnDefinition Width="*" />
                                </Grid.ColumnDefinitions>
                                <Image Grid.Column="0"
                           Source="{Binding ImageUrl}"
                           Aspect="Center"
                           MinimumHeightRequest="500"
                           WidthRequest="180" />
                                <Label Grid.Column="1"
                           Text="{Binding Name}"
                           FontAttributes="Bold"
                                   VerticalOptions="Start"/>
                                <Label Grid.Row="0"
                           Grid.Column="2"
                           Text="{Binding Company}"
                           FontAttributes="Italic"
                           VerticalOptions="Start" />
                            </Grid>
                        </ViewCell>
                    </DataTemplate>
                </ListView.ItemTemplate>
            </ListView>

        </VerticalStackLayout>
    </ScrollView>
</ContentPage>

对应的C#程序（HtListviewPage.xaml.cs）代码：

using HovertreeMaui.HtModels;

namespace HovertreeMaui.HtPages;

public partial class HtListviewPage : ContentPage
{
    
    List<HovertreeDevice> HtDevices = new List<HovertreeDevice>
            {
                new HovertreeDevice("笔记本电脑","Lenovo","16G内存","https://hovertree.com/hvtimg/201512/agagq0or_l.jpg"),
                new HovertreeDevice("电风吹","Midea","星夜蓝","https://hovertree.com/hvtimg/201601/thbniyjx_l.png"),
                // ...etc.,... 何问起
                new HovertreeDevice("移动硬盘","西部数码","1TB","https://hovertree.com/hvtimg/201512/vt1tf0xl_l.jpg"),
               new HovertreeDevice("移动硬盘","西部数码","1TB","https://hovertree.com/hvtimg/201512/vt1tf0xl_l.jpg"),
               new HovertreeDevice("电脑键盘","Lenovo","2.4G无线连接","https://hovertree.com/hvtimg/bjafjd/iofopnro_l.png")
            };
    public HtListviewPage()
	{
		InitializeComponent();

        this.htDeviceView.ItemsSource = HtDevices;
        htDeviceView.ItemTapped += HtDeviceView_ItemTapped;

    }

    private async void HtDeviceView_ItemTapped(object sender, ItemTappedEventArgs e)
    {
        await DisplayAlert("HovertreeTips",((HovertreeDevice)( e.Item)).Details, "OK");        
    }
}

在Android系统上运行该代码，效果如下图：

从效果可以发现，Android系统上，列表的子项的高度已经与Windows系统上的一致。在代码中，发现设置了Listview的RowHeight="140"。所以Listview的RowHeight的设置可以解决安卓系统上行高的问题。