[英]How to do you change the color of the "underline" marking the selected tab on a TabbedPage in Xamarin.Forms?
I'm currently adding several different themes (10-ish) to a Xamarin.Forms app.我目前正在向 Xamarin.Forms 应用程序添加几个不同的主题(10-ish)。 I've figured out how to dynamically change the color of everything except the "underline" on a tab on TabbedPage (see the attached image).
我已经想出了如何动态更改除 TabbedPage 选项卡上的“下划线”以外的所有内容的颜色(请参见附图)。
Screenshot identifying the TabbedPage "underline" with a red rectangle用红色矩形标识 TabbedPage“下划线”的屏幕截图
I've tried to set the five different color properties (that I know of) on the TabbedPage as well as the BackgroundColor on the ContentPages in the tabs:我尝试在 TabbedPage 上设置五种不同的颜色属性(我知道)以及选项卡中 ContentPages 上的 BackgroundColor:
TabbedPage tabbedPage = new TabbedPage { Title = "Tabbed Page" };
tabbedPage.BarBackgroundColor = Color.Black;
tabbedPage.BarTextColor = Color.Gray;
tabbedPage.SelectedTabColor = Color.Black;
tabbedPage.UnselectedTabColor = Color.Black;
tabbedPage.BackgroundColor = Color.Black;
tabbedPage.Children.Add(new ContentPage { Title = "Page 1", BackgroundColor = Color.Gray });
tabbedPage.Children.Add(new ContentPage { Title = "Page 2", BackgroundColor = Color.Gray });
await Application.Current.MainPage.Navigation.PushAsync(tabbedPage);
Is it possible to set the color of the "underline" in Xamarin.Forms?是否可以在 Xamarin.Forms 中设置“下划线”的颜色? Or do I need to make platform-specific changes to achieve this?
或者我是否需要进行特定于平台的更改才能实现这一目标?
Use app:tabIndicatorColor.使用 app:tabIndicatorColor。
All you have to do is to create a Tabar.xml file with below code in the layout folder(create one if needed) in the Android project's Resources folder and change the color via app:tabIndicatorColor;您所要做的就是在 Android 项目的 Resources 文件夹中的 layout 文件夹中使用以下代码创建一个 Tabar.xml 文件(如果需要,创建一个),然后通过 app:tabIndicatorColor; 更改颜色;
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.tabs.TabLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabIndicatorColor="#ff0000"/>
And then add below code in onCreate method of MainActivity.cs然后在 MainActivity.cs 的 onCreate 方法中添加以下代码
TabLayoutResource = Resource.Layout.Tabar;
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