Custom Arrayadapter With Custom Filter

I will give you a short review about what i'm trying to do: I want to fill the DropDown of a AutoCompleteTextView with my own Objects. those objects contain 3 Strings. In the list_

Solution 1:

Make your CustomerSingle class subclass Java.Lang.Object:

public class CustomerSingle : Java.Lang.Object

UPDATE:

My guess is that this line:

results.Values = (Object) newValues;

is trying to convert to System.Object instead of Java.Lang.Object, try (Java.Lang.Object) instead.