How can i create custom controls?

I want to create a simple game.I need this information how to create cu开发者_开发问答stom controls

doubts:

1. Custom controls and OnScreen controls are same or different.

2. Next how to create custom controls

3. How to create onscreen controls.

Firstly read the following official source:

http://developer.android.com/guide/topics/ui/custom-components.html

Then you can check StackOverflow links for code samples:

Where to find free open sourced android custom controls?

Creating customs controls in Android

Guide for custom UI controls