This question already has an answer here:
I am trying to create the Android emulator for Nexus 10 using latest ADT (21) and SDK tools. I have the below configurations for Nexus 10 AVD.
Screen Size - 10 inches
Resolution - 2560 X 1600
Screen Size - xlarge
Screen Density - Xhdpi
Screen ratio - long
RAM - 512 (Not able to set 1024 emulator crash)
But once AVD is created, it does not load Android; it just shows a black screen. My system is 32 bit Intel Core i3 with 4 GB RAM.
The problem is with monitor, LCD (or any other display device you are using) or graphic card. Nexus 10 has gigantic screen density, how could it be displayed or replicated on a lower screen density screen. Edit on proposal of
- Krishnabhadra
To get it working you must match your screen resolution with the scale-down resolution of the emulator. Before running an emulator a dialog-window appears in which its ask the user to set emulator screen size and pixel ratio (screen density scaled to the display device). Make sure you select the current screen resolution.
来源：https://stackoverflow.com/questions/13533516/nexux-10-emulator-avd-not-running-starting