How the app displays on different screens?

@all

How is your experience with the display of your final apps on different screens? As well as, display in Web Previewer and actual APK or installed app view?

As far I have understood, there is not much we can do to handle this. For example, I’m trying to display a List in the center of the screen. But on different screens it shows up differently and as the scroll appears on the right side, it pushes it to the left.

I tried reducing width of the list and it’s items but then on some screens it leaves blank on the opposite side of the scroll, while on some screens it still pushes the list to the left.
Things get even messier when you switch between landscape and portraits mods.ng: