Dynamically removing and adding views when needed

I have looked at this topic to dynamically add views when needed: Add and Remove Views in Android Dynamically?

However, I have a few questions.

1) Will there be a visible stutter or lag when creating these views on the go? For example, I use a panel system where each panel holds a separate view. However, these panels could reach a high number in quantity (40 odd panels?) when the program is complete. In order to preserve resources, I want only the view that is currently visible to actually be created, and the others views to not be instantiated until they are brought into the visib开发者_StackOverflow中文版le region. I have been told to use a ViewFlipper, but due to animation and user interaction requirements of my program, I cannot use a ViewFlipper, but have something along the same lines that I have created.

For example:

Imagine one of my "panels" to be pretty much like a screen in the Android Home launcher. The thing with the Home Launcher is that all it's views can be kept alive at any given time, because there's only really 7 of them. However, seeing as there are closer to 40 in mine (not all left and right, some above and below as well), I cannot have them all instantiated at the same time, or else the phone will begin to lag.

2) What is the code to destroy the views once they aren't in the visible region?

My program will determine when the panels are in the visible region or not, hence I will only need the code to destroy the views on the go.

Thanks.

Why don't you use a ListView or a GridView?

If you are not willing to use some of those, you will need to do something similar to what they do with the Adapter and how they recicle views.