WIll images sized on my phone be the same size on another phone?

I use a few small images on my app and I was wondering if (and how) I could ensure that the size of the image is relative to the size of the phone?

Also, is there a way to shrink my layout on smaller phones so each layout fits within the screen - like if a random string (lo开发者_开发知识库nger than others) would downsize in font so the whole layout was ensured to fit on the screen?

Thanks!

You might want to read through the documentation on supporting multiple screens, as it has lots of good tips on things to do or not do to make sure that your app will render properly on different sized screens.