How to adapt the layout

Hi all! I'm trying to create a game similar to Arkanoid for smartphones exporting the c2 project with cocoonjs, but I have some problems with the resolution screen. In fact using a definite size of layout, it's impossible exploiting the whole display size for each phone.

I have read this tutorial scirra.com/tutorials/73/supporting-multiple-screen-sizes but also using the Scale or Crop mode I haven't what I want.

For example, I can create a game for my samsung galaxy ace with 480 x 320, but the same app on samsung s3 with 1280x720 shows a white stripe on the edge of the screen.

Is there a way to adapt the layout depending on the screen?

Sorry for my bad english, thank you all.

I released a game on Android and I created it with 800x480 Resolution. For me this is the best balance between quality, performance and memory usage.

Thank you very much!!! The white stripes always remain but it's definitely better :) If anyone has other ideas, please post them ^^ Thanks!

Set your backround with anchor behaviour to fit completely the screen.

This is what I did and the result is pretty good.

Don't forget to ser your fullscreen mode to scale or letteebox scale

look here

scirra.com/tutorials/73/supporting-multiple-screen-sizes