Android ant build cannot find Symbol

There are two reasons for this to happen: 1.     class are exclude (ant does not exclude)  2.     import Inner class   such as      import IA. iia;     class a{                          class IA {                       class iia{                       }             & nbsp; }        public void Method () {                  //will report IA cannot find symbol                 IIA a = new IIA ();        }      Solution: Issue 1.      ExcludeDelete Issue 2.      will import IA. IIA Delete                use IA. IIA a = new IA. IIA ();