Location of the Android SDK has not been set up in the preferences in 64 bit Windows

How to Update your ADT to Latest Version?

In Eclipse go to Help

Install New Software ---> Add

inside Add Repository write the Name: ADT (as you want)

and Location: https://dl-ssl.google.com/android/eclipse/

after loading some time you will get Developer Tools and NDK Plugins

check both if you want to use NDK in the future or check Developer Tool only

click Next

Finish

Now My Problem Solved :-)

The issue may arise if you are running IntelliJ Idea or any other IDE that uses / shares the same Android SDK. After running IntelliJ Idea, and thereafter running Eclipse, the Eclipse IDE fails to get the path of the SDK. In Eclipse go to Window > Preferences > Android and change the back slashes to forward slashes. For e.g, D:\eclipse\android-sdk to D:/eclipse/android-sdk and press Apply.

I have faced the same issue Solution: go to the below URl https://dl.google.com/android/adt/adt-bundle-windows-x86_64-20140702.zip Extract the folder and now go to the preferences and select the SDK folder from the Extracted Folder, and apply it . the problem will be resolved