Questions

Hi there,

It looks like that it’s caused by some kind of limitation in Xamarin.Android which doesn’t allow to implement IPointMarkerPaletteProvider interface in class which extends PaletteProviderBase because it contains final methods. I’m going to log it into our bugtracker for further investigation and for now you can workaround it by implementing IPointMarkerPaletteProvider interface from scratch in class which inherits from Java Object class:

    class P : Java.Lang.Object, IPointMarkerPaletteProvider
    {
        private readonly IRenderableSeries _renderableSeries;
        private readonly IntegerValues _pointMarkerColors = new IntegerValues();

        public P(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
        {
        }

        public P(IRenderableSeries renderableSeries)
        {
            _renderableSeries = renderableSeries;
        }

       public void Update()
       {
              // update colors
              var count = _renderableSeries.CurrentRenderPassData.PointsCount();

              _pointMarkerColors.Clear();
              for (int i = 0; i < count; i++)
              {
                    _pointMarkerColors.Add((int)(0xFFFFFF00 | (i % 255)));
               }
        }

        public IntegerValues PointMarkerColors
        {
            get { return _pointMarkerColors; }
        }

        public void AttachTo(IServiceContainer services)
        {
            IsAttached = true;
        }

        public void Detach()
        {
            IsAttached = false;
        }

        public bool IsAttached { get; private set; }
    }

Is this suitable for your needs? Hope that this will help you!

EDIT:
I’ve added simple Update() method implementation which worked for me. NOTE we can’t use ItemsArray property because Xamarin bindings generator wraps it in a such way that when you get it a new C# array is created and when you try change its elements original Java array remains intact (initialized with 0 values). Maybe that’s why you got an empty chart when use palete provider and in this case you just need to use Add/Set methods which modify original Java array.

Best regards,
Yura