I just wanted to try ART of android 4.4 on my emulator. What I did was create an emulator with selecting device as "Nexus 7" and target as "Android 4.4" and RAM "512". Then I started emulator and it loaded. Then I went to Developer Options and selected runtime as ART. After that setting emulator started to reboot and kept on booting screen for a long time(around 1hr) and couldn't finish launching.
Can anybody explain me the reason for this issue.
There is a bug in the emulator image. See http://code.google.com/p/android/issues/detail?id=61999
You can download a modified image from http://pan.baidu.com/s/1iUQaI
来源：https://stackoverflow.com/questions/19995275/impossible-to-use-art-on-android-emulator