Is there any website showcasing all of the available UI components and widgets with source code?

I was looking for something like the Visual Guide to Swing Components (Windows Look and Feel).

A page that shows the Android UI components.

Thanks.

Android documentation has a whole section dedicated to User Interface with source code examples. The most important sub-sections are the following:

• Declaring Layout,
• Creating Menus,
• Creating Dialogs.

If you haven't check these, you should.

Furthermore, you also have these:

• Hello, Views
• A Visual Guide to Android GUI Widgets
• Android Development Tutorial