今天重装了Eclipse， 编译Android工程时（不管是以前正常的项目导入还是新建的），项目名称上打个小红叉。认真看了下错误提示为：Error generating final archive: Debug certificate expired on xxxxxx（日期）
上网找的官方给的解决办法：
To fix this problem, simply delete the debug.keystore file. The default storage location for AVDs is in ~/.android/avd on OS X and Linux, in C:/Documents and Settings//.android/ on Windows XP, and in C:/Users//.android/ on Windows Vista.The next time you build, the build tools will regenerate a new keystore and debug key
例如：（我自己的操作）进入：C:/Documents and Settings/Gavin/.android删除：debug.keystore
重新运行编译就正常了。
