If you have a 64 bit system
There is a problem with the spaces in the path, so just from: C:\\Program Files (x86)\\Android\\android-sdk
to: C:\\Progra~2\\Android\\android-sdk
Then Update Eclipse to the right path
Window, Preferences, click on Android on the left then change the
Android Preferences SDK Location to
C:\\Progra~2\\Android\\android-sdk