Android 2.x Issue

[beoss]

Hello,

I have a modified version of the menu the Xamarin ABS implementation and came across a bug with "CustomViewAbove.cs". The initialization of the interpolator caused a crash. At present my fix is to change how that is initialized; here's what I changed:

Line #27 CustomViewAbove.cs

private IInterpolator _interpolator;

Then where it is used, line 106, I changed that to this crude code:

try
{
if (_interpolator == null)
{
_interpolator = new CVAInterpolator();
}

            _scroller = new Scroller(Context, _interpolator);
        }
        catch
        {
            _scroller = new Scroller(Context);
        }

It was a quick fix for the error I ran into and needs a better solution but I figured I share what I've done with it so far.

Thomas

[Cheesebaron]

"Caused a crash" is not a very good description of what is happening. Maybe you could elaborate on that. Even better, make a reproducible condensed sample to help debug it.

[kobynet]

I'v came across this issue few months ago, hope my two cents will help.
Interpolator class was added in Api level 1
http://developer.android.com/reference/android/view/animation/Interpolator.html

TimeInterpolator interface was introduced in Api level 11 (android 3.0)
http://developer.android.com/reference/android/animation/TimeInterpolator.html

now the kinky stuff kicks in, Xamarin IInterpolator interface notes in it's description it was introduced in api level 1 BUT it derives from ITimeInterpolator which mentioned by xamarin that was introduced in api level 11

this is the interesting part of the 2 signatures disassembled from xamarin sources:

/// since version="Added in API level 1"
[Register("android/view/animation/Interpolator", "", "Android.Views.Animations.IInterpolatorInvoker")]
public interface IInterpolator : ITimeInterpolator, IJavaObject, IDisposable

/// since version="Added in API level 11"
[Register("android/animation/TimeInterpolator", "", "Android.Animation.ITimeInterpolatorInvoker")]
public interface ITimeInterpolator : IJavaObject, IDisposable

The fix i used back then is the exact fix mentioned in the first post. (no time to dig this with xamarin staff....), the fix just falls back to the default animation behavior which you can read more about in android developers:
http://android-developers.blogspot.co.il/2011/02/animation-in-honeycomb.html

This is probably bug in the android docs.

Hope this helps, good luck!