出错提示：
emulator: ERROR: unknown virtual device name: ‘Android2.2’
emulator: could not find virtual device named ‘Android2.2’
解决方法：
增加环境变量：
ANDROID_SDK_HOME = "D:\Program Files (x86)\Android\android-sdk-windows"
软件版本：
Windows：7(6.1.7600)
Java SDK：1.6.0.23
Android SDK for Windows: r09
That’s going to make things a lot esiaer from here on out.