I'm using Windows 7 and Eclipse Helios. I installed all packages successfully and I could run avd on the command line, but Eclipse was not showing the AVD Manager window and my android project. Why?
I know its a bit late answer but for future generations - this is how its done: Click on Window > Customize perspective > Command Groups Availability tab. Check the "Android SDK and AVD Manager" option and hit the OK button.
Before doing what user1450537 said, check to see if you're in the Java perspective. I was in the PHP perspective and couldn't find it! duh
This is for new eclipse Neon:
Window ->Perspective -> Customize perspective -> Action Set Availability then Check the "Android SDK and AVD Manager" option and hit the OK button.
来源：https://stackoverflow.com/questions/5323067/eclipse-not-showing-avd-manager-window-and-android-project