Question: I have added a view to a layout which occupies a part of my screen. To this layout I want to add another layout which will be transparent. On this layout there should be only two lines which will scroll over the background layout. This I am doing so that my background layout is not invalidated and only the foreground is invalidated.

How can I add another layout which will be transparent?

Answer: 
Use `FrameLayout` as a parent layout and stack it up with as many layouts as you want. Thats one part of the answer. To make a layer (a layout in this case) transparent, set the alpha value in its background (a color) to 0. For instance `android:background="#00777777"` sets a background which is translucent with a dull gray. 

You get the idea.
Use fram layout, which will allow you to add two views on each other.