Android: import cannot be resolved

Recently I kept hitting an issue of Eclipse not recognising my imports (even though they were there). I was always getting the message:
import ClassName cannot be resolved.

You can try following:
1.‘Clean’ Your Eclipse Project:
 Go to Project > Clean in Eclipse
Refresh your project folder (right click on your project > refresh)
Re-build your project

2.Check your Android SDK version.
project-->Properties-->Android-->Project Build Target
Select target Name

3.default.properties
Modify project build target and android.library.reference.1

Hope those tips help!