Issue with Multiple Screens in Android

I have my application developed for Samasung TAB exclusively. But when I am deploying to mobile devices such as NexusOne, the UI is going off the screen. I read documentation, I fou开发者_如何学Pythonnd I need to add inside my manifest file. I did but it's not working. Can anyone help me out of this.

Thanks in advance...

It must be done inside layout files, not inside the manifest. Just make your layout flexible enough to run on different screens without going out of bound and becoming unusable.