As we know Android coming with various device which having different Features, Resolution, and Screen-size so while developing an Application which support multiple (small a
Designers should create base designs of
base size of mdpi devices * density conversion factor of highest supported density bucket
size.Base screen size is 320 X 480 px and density buckets are as follows:
And to tackle extra available space on Android devices should use stretchable components in both the directions (horizontally and vertically). Detailed info is available here:
http://vinsol.com/blog/2014/11/20/tips-for-designers-from-a-developer/