Error in Adding the In-app Billing Library

Question

I was doing this following these steps as mentioned in the link.

1. Copy the IInAppBillingService.aidl file to your Android project.
   (1) If you are

Answer 1

In the /src directory, click File > New > Package, then create a package named com.android.vending.billing

Copy the IInAppBillingService.aidl file from /extras/google/play_billing/ and paste it into the src/com.android.vending.billing/ folder in your workspace.

Build your application. You should see a generated file named IInAppBillingService.java in the /gen directory of your project.