原文：http://stackoverflow.com/questions/6715403/some-projects-cannot-be-imported-because-they-already-exist-in-the-workspace-err
如果在導入android工程的時候出現以下提示：
some projects cannot be imported because they already exist in the workspace
說明以前導入過這個工程，沒有删除幹淨。
解決辦法：
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vote
uncheck the "copy projects into workspace" selectbox, and then click "refresh" button, you will be able to import the project
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