On my Android app, when popping up, say a confirmation dialog, I'd like to make the UI go dark behind it as is common with Android UI's. I can probably come up with something (e.g. have a texture that is above all other UI elements and make it visible and maybe 80% opaque, and have the popup appear above that). I've tried setting my rood node control's opacity to say 0.1 and that is mostly there, but some elements don't look great. I'm thinking there are better ways. Any ideas? Thanks.