in flex mobile apps,we always need to pop up a window and center it,at this moment,we can either set absolute size of the window or relative size.
however for a variety of android devices with different size,this kind of setting seems not a good idea,for example,
pop-up window with absolute size of 300*200 on 400*800 mobile would look not good on device of 720*1280 size.
pop-up window with relative size of left=30 and right=20 on 400*800 mobile would also look not good on device of 720*1280 size.
so,i want to ask,what is the best setting or display strategy when needing to pop up a window?