Android emulator shows nothing but blank screen

Question

I am a complete nOOb to Android programming and trying my hands at it for the first time by going through the tutorials. The problem is that I have created multiple emulator

Answer 1

Tried all of the above. What eventually worked, was a combination of using software based graphics rendering, in combination of 'older' device images (nexus 7 works, nexus 10 doesn't). Go figure. And yeah, it's very slow.