Xamarin Forms Android搜索栏删除下划线

Question

希望这不会被叮叮当当，我看过其他帖子，似乎没有任何效果。

法典：

<controls:SearchPageSearchBar Grid.Column="1" Scale=".8" Margin="0,0,0,0" x:Name="searchBar"
BackgroundColor="White"  
SearchCommandParameter="{Binding Text, Source={x:Reference searchBar}}"
Placeholder="Search" >
</controls:SearchPageSearchBar>
public class SearchPageSearchBarDroid : SearchBarRenderer
{
public SearchPageSearchBarDroid(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<SearchBar> args)
{
base.OnElementChanged(args);
var plateId = Resources.GetIdentifier("android:id/search_plate", null, null);
var plate = Control.FindViewById(plateId);
plate.SetBackgroundColor(Android.Graphics.Color.Transparent);
}
}

也在这里尝试了所有解决方案 https://forums.xamarin.com/discussion/140247/how-can-i-remove-the-underline-in-searbar-on-android

Answer 1

[assembly: ExportRenderer(typeof(SearchPageSearchBar), typeof(SearchPageSearchBarDroid))]

我测试了你的代码，它有效，你有没有在你的搜索页面搜索栏机器人中错过上面的一行？

[assembly: ExportRenderer(typeof(SearchPageSearchBar), typeof(SearchPageSearchBarDroid))]
namespace App18.Droid
{
class SearchPageSearchBarDroid:SearchBarRenderer
{
public SearchPageSearchBarDroid(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<SearchBar> e)
{
base.OnElementChanged(e);
var plateId = Resources.GetIdentifier("android:id/search_plate", null, null);
var plate = Control.FindViewById(plateId);
plate.SetBackgroundColor(Android.Graphics.Color.Transparent);
}
}
}