Don't think of this as an android specific problem. Your question isn't very clear, but if you're looking for collision detection and physics there is a nice android port of box2d. http://code.google.com/p/androidbox2d/
As for the "rectangular bound bitmap," I'm unsure of what you're talking about. Rendering is done with Opengl ES and is pretty much the same as Opengl.
Take a look at andEngine, It'll make development alot easier if you're a novice. http://www.andengine.org/