What is the "Ignoring InnerClasses attribute" warning output during compilation?

android compiler-warnings

Solution 1:

If your app and your libraries have all been built with a new JDK (7+) and you are still getting this, then you can fix this problem by telling Proguard to keep the enclosing method attribute. Just add the following to your Proguard rules:

-keepattributes EnclosingMethod

Solution 2:

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.

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