Eclipse Error : Using 1.7 requires using Android Build Tools version 19 or later; currently using 17.0.0 ?

The project shows this error when relevant build tool is not set for the Project.
First goto Eclipse-->Windows--->Android SDK Manager and installed the relevant build tool required by the application.After installation is completed close the SDK manager.

Then add the below line in "project.properties" file of then prject.Error will be resolved.

sdk.buildtools=19.1