你用的是什么操作系统?我使用Linux Mint。在我的例子中，结果是一个符号链接问题。每次我尝试用符号链接路径创建项目时，它都会给我这个错误。在其他地方创建项目，然后将其迁移到符号链接目录，为我解决了这个问题。

解决这个问题最简单的方法就是将项目移动到另一个文件夹并导入。这是因为您已经在该文件夹中有了该项目(或具有相同名称的项目)。当您删除project时，eclipse仍然保留对它的引用

今天我意外地解决了这个问题:

以下2个步骤可能不涉及，但不确定:

从(Eclipse菜单)调用*“/Window/Android SDK Manager”并更新a)“Android SDK Tools”“Android SDK平台工具”包 从Eclipse菜单“/Help/Check for Updates”调用并更新Eclipse。重新启动Eclipse。

以下步骤是必要的:

From eclipse menu "/File/Import/Android/Existing Android Code Into Workspace" Browse and select problematic project/or problematic projectS parent directory. Check "Copy projects into workspace". Check "Add projects into working sets". Press finish. [Optional scenario]: If project(s) and their containing folders have been renamed with the fully qualified package names then simply click on project node parent (where you see project package name instead of project's old name) in Eclipse and rename project with old name. Eclipse will rename folder too.

附注:在日蚀朱诺号上测试过。

Edit: Many times have passed since this answer and new Eclipse and Android SDK arrived. They have no much more problems during importing existing projects. The only thing one has to consider before importing is to move project folders(those ones one is willing to import) outside of eclipse workspace dir and then check checkboxes ("copy projects into working sets", "add projects into wokring sets") in import wizard dialog. Also I recommend doing this with latest Android SDK because it no more imports projects with dummy names and does not rename folders as it did in some custom cases.

转到项目的。project文件，确保它显示的名称与项目文件夹中显示的名称相同。如果不是，请更改名称。它会起作用的。

我摆脱了我的问题通过改变文件>工作空间，然后，重新启动后，重新设置工作空间。

我使用以下步骤解决了这个问题:

File ->导入 单击General，然后在Workspace中选择Existing Projects 单击Next 浏览项目目录 单击Finish。

这对我很有效