build.xml not found

[amineelmouradi]

=> While unpacking android packages i get this error :

...
I've finished unpacking the Android SDK.

I'm about to download and install the required Android packages. This
might take a while.

I'm updating the library packages.

Error: Target id 'android-22' is not valid. Use 'android.bat list targets' to get the target ids.
Error: Target id 'android-22' is not valid. Use 'android.bat list targets' to get the target ids.
...

=> It ignores the errors and finishes the installation successfully but when i try to build the rapt example i get this error :

I'm using Ant to build the package.

Buildfile: build.xml does not exist!
Build failed

The build seems to have failed.

Please help , i've been struggling with it for more than 3 days xD !! thanks