Screen redraw event monitoring
<p>I'm building a whiteboard application for Android, with which I can draw on the screen remotely ( not just to my application/widget area, but any screen ). I'm doing this by drawing to the mmapped framebuffer area, which is working, but I also need to clear the screen ( i.e. redraw the whole screen when I wish to erase the drawings. )</p>

<p>I have searched a lot to find some mechanism by which I can detect and trigger screen events ( redrawing, framebuffer switch ) but came up empty. The only way I can think of redrawing the whole screen is by starting an empty activity with no title bar, end then closing it.</p>

<p>Does somebody encounter/solved this, or know any better way of doing this?</p>
