Android, Which screen size do you develop for?

I am creating a simple game in android so I can create something and learn how to program in Android (I'm a noob).

Right now in my layout editor (i think thats what its called, bas开发者_JS百科ically the place where you can create your layout xml files) there are many sizes on the top left... which one should i target? do i need to make a separate layout for each one of them?

Thanks! R

The screen size selection is only intended to give you an impression of what the layout looks like on various screen sizes and densities. A good place to get started is Common Layout Objects and Supporting Multiple Screens.

When developing for Android, you should not target a specific screen size, but instead make layout elements fit proportionally. An exception may be x-large displays such as tablets, for which a great read is Distributing to Specific Screens. An example of getting elements to position nicely is this question.