The Android build issue with latest ionic command


I have done a app with the latest started guide, and I would like to build the Android target on android-20, but it can not work.The necessary env setting has been done. Can some nice man help?

ericPro:foodtime eric$ ionic info

Your system information:

OS: Mac OS X Yosemite
Node Version: v0.10.35
Cordova CLI: 5.0.0
Ionic CLI Version: 1.3.20
Xcode version: Xcode 6.1 Build version 6A1052d
ios-sim version: 3.1.1
ios-deploy version: Not installed