Adding a child view at particular location in parent view

I n开发者_Go百科eed to draw a child view containing a rectangle and button on top of the content view at particular location on the parent (content view).

How can I do this? Did not find an explicit way to set origin of child view?

---

It depends. If you are talking about placing the rectangle at an absolute position, remember that android devices come with many many screensizes.