What is the “Ignoring InnerClasses attribute” warning output during compilation?

Question

I am new to Android and am using the Ical4j library for parsing ICS (Outlook calendar) files.

However, when I build my application in Eclipse, the follo

Answer 1

This is quite common when including jar files. Although the warning isn't anything to worry about if you are just using the API normally, you should be able to get rid of them by compiling ical4j yourself from source within Eclipse (either build a new jar, or just drop the source into your own source folder). Though I should stress that unless you actually get problems, this isn't something to worry about.