Suppose you have something like: /prj/workspace/prj1 /prj/workspace/prj2 And your eclipse workspace is in /prj/workspace level (i.e. /prj/workspace/.metadata). If you're having problem importing prj1 and prj2, you can either move your .metadata somewhere else (/prj/.metadata, /prj/eclipse/.metadata, etc.) or create a sub level in workspace so that it looks like: /prj/workspace/android/prj1 /prj/workspace/android/prj2 And import prj1 and prj2 again. In another word: as long as prj1, prj2, and .metadata are not in the same level it will be fine.

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.

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

我使用以下步骤解决了这个问题:

1) File -> Import
2) Click General then select Existing Projects into Workspace
3) Click Next
4) Browse the directory of the project

单击Finish。

这对我很有效

我也一直在为类似的问题而绞尽脑汁。唯一有帮助的就是遵循这篇文章中的步骤。

Suppose you have something like: /prj/workspace/prj1 /prj/workspace/prj2 And your eclipse workspace is in /prj/workspace level (i.e. /prj/workspace/.metadata). If you're having problem importing prj1 and prj2, you can either move your .metadata somewhere else (/prj/.metadata, /prj/eclipse/.metadata, etc.) or create a sub level in workspace so that it looks like: /prj/workspace/android/prj1 /prj/workspace/android/prj2 And import prj1 and prj2 again. In another word: as long as prj1, prj2, and .metadata are not in the same level it will be fine.