如何更改 Xamarin Forms 中标签页指示器的颜色

Question

I'm making an app using Xamarin Forms. I have a tabbed page and wish to change the color of the tabbed indicator. However I am unable to change it from the default of white.

A white indicator example:

I've tried changing the tabIndicatorColor in the Tabbar.xml file as shown below:

<android.support.design.widget.TabLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:tabIndicatorColor="@color/colourSelected"
app:tabGravity="fill"
app:tabMode="fixed" />

However this doesn't change it, no matter what color I use, the indicator will still be white. How do I go about fixing this?

Answer 1

Took me a while, but the problem seems to be a bug compiling with Android 10.0. Changing the "Compile using Android version" option to 9.0 from 10.0 in the android application screen fixed the problem.

After doing that, tabIndicatorColor works as intended.