\"Location of the Android SDK has not been set up in the preferences in 64 bit Windows\" - I know this problem has been addressed before several times, but rather than comme
It means the "Android SDK" folder is empty, that's why it does not want to add it to Eclipse. Here are the contents of the Android SDK folder:
Windows: https://dl.google.com/android/adt/adt-bundle-windows-x86_64-20140702.zip
Mac: https://dl.google.com/android/adt/adt-bundle-mac-x86_64-20140702.zip
Download and extract the contents to a new folder and name it android-sdk and link that directory to Eclipse and you are all set!