Is there a way to completely block the ability to take screenshots in Android?

I'm currently developing a light-weight application where in one part of the app I would like to COMPLETELY take away the ability to take a screenshot in Android. When I say screenshot, I'm talking about iPhone's "screen capture" feature. This is for security reasons. I realize there are apps out there that allow users in Android to do this as well, and I want to block this functionality. Any way of doing this is fine, whether disabling the hardware buttons, freezing the phone, or via software.

Solution

You can use the window LayoutParam FLAG_SECURE. Add this to your onCreate method:

if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
}