[Mono-bugs] [Bug 645257] New: ArrayAdapter<T>.Add(T item) Fails With Custom Types - Unable to Convert to Android.Runtime.IJavaObject

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=645257

https://bugzilla.novell.com/show_bug.cgi?id=645257#c0


           Summary: ArrayAdapter<T>.Add(T item) Fails With Custom Types -
                    Unable to Convert to Android.Runtime.IJavaObject
    Classification: Mono
           Product: MonoDroid
           Version: unspecified
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Runtime
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: pdbarnett at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: Beta-Customer
           Blocker: Yes


Description of Problem:
When creating an ArrayAdapter using a custom type, attempts to add a new item
to the array fail.  It appears that the runtime is trying to cast the object to
an Anroid.Runtime.IJavaObject object but the class does not implement this
interface.  Attempting to implement this interface results in further problems
including NullReferenceExceptions.

Steps to reproduce the problem:
1. Define a custom class (e.g., "MyCustomItem")
2. Instantiate an ArrayAdapter<T> using the type (e.g.,
ArrayAdapter<MyCustomItem> adapter = new ArrayAdapter<MyCustomItem>(...);
3. Add instances of the custom type to the array  (e.g., adapter.Add(new
MyCustomItem());
4.  Run the code.


Actual Results:

Unhandled Exception: System.NotSupportedException: Do not know how to convert
value '(<type.ToString())' of type 'MyCustomItem' into an
Android.Runtime.IJavaObject instance.

Expected Results:

No exception.

How often does this happen? 

Always

Additional Information:

The <type.ToString()> in the error message is actually just the output of
ToString() on the custom type

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