Exception when using SkiaSharp API in Xamarin Forms Tabbed Page - exception

Question

I'm facing some problems at the time of painting a circle with the SkiaSharp API in one of the children pages of a Tabbed Page in Xamarin Forms.
Although I get no errors during the building of the project, whenever I enter the page in which the circle is supposed to be drawn during the on device debugging, the application throws a "System.InvalidCastException: Specified cast is not valid" message and it crashes.
This is the XAML code of the Tabbed Page:
<?xml version="1.0" encoding="utf-8" ?>
<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:me="clr-namespace:TestBth;assembly=TestBth"
x:Class="TestBth.MyTabbedPage">
<TabbedPage.Children>
<me:ConnectPage />
<me:LissajousPage />
<me:ParametersPage />
</TabbedPage.Children>
<!--Pages can be added as references or inline-->
</TabbedPage>
This is the XAML code of the page that's causing the trouble:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:skia="clr-namespace:SkiaSharp.Views.Forms;assembly=SkiaSharp.Views.Forms"
xmlns:local="clr-namespace:TestBth"
x:Class="TestBth.LissajousPage"
Title="Lissajous">
<skia:SKCanvasView x:Name="canvasView"
PaintSurface="canvasView_PaintSurface" />
</ContentPage>
And this is the internal code of the same page:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using SkiaSharp;
using SkiaSharp.Views.Forms;
namespace TestBth
{
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class LissajousPage : ContentPage
{
SKPaint blackFillPaint = new SKPaint
{
Style = SKPaintStyle.Fill,
Color = SKColors.Black
};
public LissajousPage()
{
InitializeComponent();
}
private void canvasView_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
SKSurface surface = e.Surface;
SKCanvas canvas = surface.Canvas;
canvas.Clear(SKColors.CornflowerBlue);
int width = e.Info.Width;
int height = e.Info.Height;
//Set transforms
canvas.Translate(width / 2, height / 2);
canvas.Scale(width / 200f);
//Clock Background
canvas.DrawCircle(0, 0, 100, blackFillPaint);
}
}
}
Any idea about why could this be happening?
Thanks in advance.

Answer 1

For my surprise, it turns out the SkiaSharp.Views.Forms Nuget package was not installed for Android.
I specified that I wanted to install it in all my projects but there must have been a problem during the installation.
I installed the package individually for Android and it works fine now.
Sorry for the inconvenience.