Type R is already defined error

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今天import a project, 編譯時間提示Type R is already defined error， google， stackoverflow,  找到一個solution， 

"The type R is already defined"

That‘s the message you get in Eclipse if you try to build the Funambol Android Sync Client. Reason is that you have checked two Builders that try to generate the same class. You just have to uncheck the Java-Builder from Project->Properties->Builders. Then the application even works fine in the Emulator.

去掉Java-Builder 時， 出現一個warning， 照做後， 編譯ok 了， 但是debug 過程中出現wierd錯誤， 比如clean， rebuild 後修改的地方沒有生效,

都要抓狂了～@[email protected]#[email protected]#$,  後來想起那個warning， 果斷恢複原來設定， 再google， 發現原來時src 目錄下 也有個 R.java 導致的, delete 後clean & rebuild, test ok.