title: DrawerLayout DrawerLayout cannot be resolved as a type
body: <p>i'm trying to use DrawerLayout in my application, as a start i've download the sample from google developer website and it worked just fine 
  then i downloaded sherlockActionBar and tried to again to create m DrawrLayout and it gave me the following error 
  "<strong>DrawerLayout cannot be resolved as a type</strong> "
  i checked my google sample to check what i've done wwrong and i found that the google sample also have the same error !!</p>