For the .Net product the CHM file contains a section "Tutorials" which contains "Creating Custom Node Types". I can't find any corresponding information in the CHM for the Android product. I'm still very new to Java, so even if the Java requirements are about the same as the .Net requirements I'm still at a loss as to how to define the custom nodes in Java.

Edit: Specifically, I'm getting the following exception:
com.mindfusion.diagramming.XmlException: java.security.InvalidParameterException: Failed to instantiate item of type 'com.Merlinia.OutBack_Client.CustomNodes.NodeOfficeArea'.
at com.mindfusion.diagramming.Diagram.loadFromXml(Diagram.java:1623)
at com.mindfusion.diagramming.Diagram.loadFromXml(Diagram.java:1488)

I've tried to add a constructor with one argument, as is needed for .Net, but the Java version constructor does not accept any arguments.

Edit 2: Sorry, the thing about the constructor not accepting an argument was my mistake. But I still miss the "Creating Custom Node Types" tutorial in Java.

Thanks for answering. Yes, I'm now able to load the XML serializations from the Windows system.

Next problem is to render the custom things. I've downloaded your Java Swing product to look at the sample programs there, but I can see that the drawLocal() methods in Android and Java are different - Canvas vs. Graphics2D.

Do you have a sample program for Android that demonstrates custom nodes?

Here is a sample node class drawing rectangular shape with a horizontal line in the middle:

class MyNode extends DiagramNode
{
	Paint background;
	Paint border;

	@Override
	protected void drawLocal(Canvas g, RenderOptions options)
	{
		if (background == null)
		{
			background = new Paint();
			background.setStyle(Paint.Style.FILL);
			background.setColor(android.graphics.Color.WHITE);
		}
		g.drawRect(0, 0, bounds.width(), bounds.height(), background);

		if (border == null)
		{
			border = new Paint();
			border.setStyle(Paint.Style.STROKE);
			border.setColor(android.graphics.Color.BLACK);
			border.setStrokeWidth(0.3f);
		}

		g.drawRect(0, 0, bounds.width(), bounds.height(), border);
		g.drawLine(0, bounds.height() / 2, bounds.width(), bounds.height() / 2, border);
	}
} 

I'm just learning Android's drawing API and it looks closer to .NET's GDI+ than Java Swing to me. In Swing you set current paint and stroke objects on the graphics and next draw calls use them. In Android you pass stroke or fill objects (both represented via Paint class) to each method call as in GDI+, and there are some similar classes like regions and paths.

I hope that helps,
Stoyan