No constructor found for Xamarin.Forms.Platform.Android.LabelRenderer (xamarin forms)

Question

I have a list of image in my xaml on pcl project when I test my app in my samsumg galaxy s5 device I do this: I enter in the page of the list, then I press the back button o

Answer 1

You've named your class LabelRenderer, which already exists in the Xamarin.Forms.Platform.Android namespace.

In the assembly attribute, typeof(LabelRenderer) is equivalent to typeof(Xamarin.Forms.Platform.Android.LabelRenderer), but we need it to be typeof(neoFly_Montana.Droid.LabelRenderer).

An easy way to avoid these namespace conflicts going forward is to use a unique class name, like NeoFly_MontanaLabelRenderer.

And when using Xamarin.Forms v2.5+, we need to use an overloaded Constructor, which I've added below.

For Xamarin.Forms v2.4 (and below)

using System;

using Android.Runtime;

using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

using neoFly_Montana.Droid;

[assembly: ExportRenderer(typeof(Xamarin.Forms.Label), typeof(NeoFly_MontanaLabelRenderer))]
namespace neoFly_Montana.Droid
{
    public class NeoFly_MontanaLabelRenderer : Xamarin.Forms.Platform.Android.LabelRenderer
    {

    }
}

For Xamarin.Forms v2.5+

using System;

using Android.Runtime;

using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

using neoFly_Montana.Droid;

[assembly: ExportRenderer(typeof(Xamarin.Forms.Label), typeof(NeoFly_MontanaLabelRenderer))]
namespace neoFly_Montana.Droid
{
    public class NeoFly_MontanaLabelRenderer : Xamarin.Forms.Platform.Android.LabelRenderer
    {
        public NeoFly_MontanaLabelRenderer(Context context) : base(context)
        {

        }
    }
}