Adt doesn't create default hello world but command line does

This problem was because of New version of SDK and ADT so to update ADT please add this address: https://dl-ssl.google.com/android/eclipse/ ** Be aware it doesn't work with exciting address begin with http so go to Install New software in ADT and do these steps:

Then Select this and press Next and Next and accept licence and press finish to download and install:

Now after restart ADT if you create a project it will work another problem i saw was the AVD doesn't work correctly you can not add new device to solve this problem run this command from SDK path:

~/Program/android/adt/sdk/tools $ ./android avd

After add your device go to ADT and open AVD from eclipse and press Refresh

It should work now

As one guy said

I had the same problem even though I downloaded the Android SDK and did a clean install, but I just resolved it. I tried to click "Help" -> "Check for updates", and then I got a pop-up message saying everything was up to date, but after further research it appeared to me it wasn't up to date. What you need to do is click "Help" -> "Install new software" and install (this will update it) from this url: https://dl-ssl.google.com/android/eclipse/

See here thread https://code.google.com/p/android/issues/detail?id=66647