custom ImageView with property and mvvmcross binding - binding

Question

I have a Xamarin Android porject with MvvmCross.
For testing, I added a CustomImageView with a HslBackground property
public class CustomImageView : ImageView
{
private HslColor _hslBackground;
public CustomImageView (Context context)
: base(context) { }
public CustomImageView (Context context, IAttributeSet attrs)
: base(context, attrs) { }
public HslColor HslBackground
{
get { return _hslBackground; }
set
{
if (_hslBackground != value)
{
_hslBackground = value;
byte r, g, b;
value.ToRGB(out r, out g, out b);
this.Background = new ColorDrawable(new Color(r, g, b));
}
}
}
}
Here is my layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Example.MVVM.Droid.Controls.CustomImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/colorView"
android:adjustViewBounds="true"
local:MvxBind="HslBackground HslColor" />
</LinearLayout>
I added breakpoints to the HslBackground property, but either getter nor setter is called. Any idea what to do? I am using the latest MvvmCross from Nuget.
Update 1:
I see in the log
MvxBind:Error: 0.99 View type not found - md56c24830106cce038b53f4325e503c583.CustomImageView
MvxBind:Error: 0.99 View type not found - md56c24830106cce038b53f4325e503c583.CustomImageView
[art] JNI RegisterNativeMethods: attempt to register 0 native methods for md56c24830106cce038b53f4325e503c583.CustomImageView
Update 2
Binding the property to TextView works
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="24dp"
local:MvxBind="Text HslColor" />