Unable to resolve target 'android-21'

Question

I have the latest ADT plugin for eclipse: ADT-23.0.4 .
Eclipse Version: Luna Service Release 1 (4.4.1) .

Still I am getting this error while importing a project:

Unable to resolve target 'android-21'

Answer 1

Right Click on Project -> Properties -> android -> choose your target api level you have, Then press Apply and Ok

And clean the project once and rebuild it.

Answer 2

Go to Windows -> Android SDK Manager Install the Android API Level you want, in this case 21.

Once you've finished installing, go to Window -> Preference -> Android . You should get a list of available targets. Click Apply then Ok .

Now right click your project, go to properties. Click Android. Choose your desired target.